I barely associate with any of my extended family, so not much has changed since the cult formed. The distinction that cousins/aunts/uncles are 'family' isn't all that impactful to me. If we were of similar age, same geographic location, similar interests and values, perhaps we would be friends, just like any other person.
Thankfully my immediate family parents/sibling are not Trumpers in the slightest. My in-laws have some conservatives in the old sense of wanting to pay as little tax as possible, certainly some Trump voters in there, but they have the decency to not talk about it, thus not truly MAGA.
I have a lot of sympathy for decent, normal people that have MAGA/Trumpers in the family. Hopefully you learned some strategies over the last several years that can be applied over the next several.
I get such a kick out of people - are they stupid? - that think these matters are simply a 'difference of opinion' or that you're ending a relationship over a vote. It's not merely just a difference of opinion, no one is ending a relationship because one person prefers sausage pizza and the other prefers pepperoni. It's not even just a difference of opinion on a contentious policy like pro life or pro choice.
It's a difference of opinion on what is reality, on whether trying to steal an election is bad, it's a difference of opinion on basic decency, what is right and what is deplorable. If we have vast differences on these things, I don't give a shit that your mother had the same mother as my mother or whatever, I want nothing to do with you.
Although not healthy for the country as a whole - who gives a shit anymore? - there are some advantages in the reorientation of the parties since Trump's takeover of the GOP: Educated, white collar, in a city? You can live your life without much known exposure to MAGAs at all.