Why I am getting rid of the Note 10+

Just from your post I see in less than 1 full year you have had a Note 9, Iphone, Note 10+, now a Pixel 3a.
And you plan to get the Pixel 4 in a few months.

Going through phones like toilet paper is wasting money IMO. Even if you resell them you are taking a loss.
Paying for experience. If I had it like that, I'd switch every couple of months.