Your ancestry&me test came back 90% Afghan when your great grandparents and above spoke farsi?
This is cap I'm sorry
But yeah Lailli is a desi
This is funny because every self-hating Pakistani nationalist has claimed these 3 nationalities hahahahaha if she's actually claimed those nationalities she's definitely got Pakistani in her (from Monas side)
If you guys like, I can go into the history of why Pakistanis are so self-hating but I'll try to keep it short and sweet for readability.
After the partition, the British drew random borders in South Asia. Pakistan's borders claimed Afghans and Balochis (iranic people) and part of Punjab. 3 different ethnic groups. Also, brown converts immigrated to Pakistan post partition and in order to avoid discrimination (because a lot were from OBC/'untouchable' tribes and clans and others were Hindu converts that didn't want to be discriminated for their religious lineage) created lies about how their ancestors were Arabs, Turks or Persian to hide their ancestral lineages. These were the only choices you had, change your background for social mobility or accept your background and be subjected to punishment. Some high-caste desis were honest about their lineage, but that was only because they would not be discriminated against for it and most of them have been constrained to the middle-class because of how entrenched the caste system is. The state also enables this, if you wanna read into it you can search Arabisation of Pakistan.
Anyway, if you look at the state of Pakistan now, Punjabis with falsified lineages that try to benefit from Arab/Persian supremacy in Pak are at the top of the ladder, whereas the low caste Muslims converts are left behind. That's probably why Laillis grandma wrote that book too, I doubt if Lailli did an ancestry test she'd have any Persian in her. Their Iranian ancestry was most definitely falsified so they could portray themselves as 'high-caste' Ashrafs, and it seems to have worked since Mona's family reside in Clifton and Mona grew up there. It's an affluent area littered Pakistani old-money.
It's so funny how Lailli's claims of being old money are most likely true but now she can't claim them. Pakistani old-money is extremely affluent and has a lot of political power, I'm sure Lailli's Clifton family are well-connected with the Pakistani establishment too. I know she grew up in a shithole in Watford but a friend of mine whose family is affluent as well grew up in similar conditions to Lailli (separated parents, mom had to make it on her own even though they had money back home) so I don't see that as being an indicator of her current financial situation, especially considering how hard it used to be to transfer money from Pak to the UK because most rich pakistanis don't declare their income (to avoid tax)
TLDR:
People in Pakistan claim Arab/Iranian heritage as a result of British colonialism and the caste system, people with 'pure Muslim heritage' are at the top of the ladder, converts from high castes in the upper middle and OBCs/untouchables at the bottom, even in present day Pak. This explains Laillis grandmothers book which contains a (most likely falsified) claim of Iranian ancestry.
Mona being raised in Clifton implies that the family does have money, probably old feudal money. I speculated that Lailli being raised in Watford doesn't mean much b/c many affluent Pakistanis faced socioeconomic hardship after immigrating to the UK because they couldn't transfer cash out of Pakistan (gov makes it hard on purpose), most rich pakistanis couldn't (and still can't) move money out of the country b/c they don't declare their yearly income to avoid tax, they couldn't move money out of the country legally so a lot of them established themselves outside the UK with what little they could pool together.
Why are you talking about the OCI? Did she mention getting it?
Are you speculating that Lailli has to be fully Indian to enter India as any Pakistani heritage will prevent her from doing so? I went for a friends wedding and they were very strict with me, I could only stay in one region iirc but because the people sponsoring me were respected my visa got accepted. I'd visited Pakistan recently before that trip too, it depends on a myriad of factors. Plus I know Pakistani-Indians who have entered India to visit their family, getting the visa is hard but not impossible and you don't need an OCI so she doesn't have to be fully Indian to enter