Oh I agree the niggle is still there, but I think Garcia The Great hit the nail on the head a few pages back, with the old cliché that as an American she's more comfortable expressing herself, whether that was on TikToks, or now speaking so publicly about emotional subjects of love, loss and grief.
We can relate far more to the almost awkward Liam in their previous social media together, as we're not so good at the self expression
The family thing I guess we'll never know, but maybe they did spend more time together that we weren't aware of, and I know it's been leaked and translated but Geoff himself has said she loved and cared for him.
If there was any awkward distance, it probably did come from Liam rather than Kate, he would have known the trouble and upset caused to his family with his struggle for sobriety over the last few years, and especially as they seemed to be deviating on what would help, ie Geoff wanting him to carry on focusing on music, Roger and Liam with the investments etc, I can see him maybe taking a step back, less contact etc if he thought they didn't approve of what he was doing, most of us don't like disappointing our parents, especially to the scale it looks like they were the ones who ended up facilitating his contact with his own son