Actually, Rawan Bin Hussain is lying about this. Throughout the coronavirus pandemic, all first-degree relatives of Kuwaiti citizens were allowed to enter Kuwait. This includes non-Kuwaiti children of Kuwaiti mothers. So Rawan is lying. Rawan is not the first famous influencer with non-Kuwaiti children. Like that "Dr Kholodi" married to Jordanian man, her daughters are all non-Kuwaiti and they had no problem entering Kuwait. Also, all if not most GCC and Arab countries don't give citizenship to children born to citizen women and foreign men so Kuwait is not alone in this but on social media, people are always acting like Kuwait is the only country in the world that does this. Rawan knows that it's really easy to spread fake news about Kuwait.
According to Kuwaiti law, non-Kuwaiti children of Kuwaiti mothers and foreign fathers are granted Kuwaiti citizenship if the mother divorces the father. Since Rawan is divorced from that Libyan guy, her daughter Lily should have Kuwaiti citizenship by now but it's clear that Rawan never bothered to help her daughter get Kuwaiti citizneship. And it's clear that Rawan hates Kuwait and Kuwaitis.
British citizens do need a visa to enter Kuwait and this visa is done online (electronic online visa system), so Rawan was definitely lying when she said "British citizens don't need a visa to enter Kuwait". They do need a visa, even if the mother is Kuwaiti. You just go online enter the website and apply for the visa, you get a text message saying the visa application is approved 15 minutes later. Very simple and easy process. You do this before entering Kuwait. Even Kuwaitis need a visa to enter the UK there is an electronic online visa system it's very easy like a waiver Rawan could have easily gotten a visa for her daughter if she really cared enough. I think that Rawan is lying because she is looking for any way to justify the fact she hasn't stepped foot in Kuwait in nearly 4 years even when her mother was on her deathbed in Kuwait she was very sick in the hospital and when her mother died she was partying and dancing in Morocco as if nothing happened. Rawan's behaviour is so bizarre. A lot of people inside Kuwait were spreading rumors about Rawan (like, that she lost her Kuwaiti citizenship and is banned from entering Kuwait) so I think she is claiming her "daughter wasn't allowed to enter" to dispel all these rumors about her.