Can't you use FlashFire?
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---------- Post added at 07:47 PM ---------- Previous post was at 07:44 PM ----------
I don't have a Pixel, but can't people use FlashFire to take an OTA? I haven't used his app for about a year+ so things maybe changed.
I forget version numbers but Flashfire hasn't worked with Magisk for quite a while. I think Pie is also a problem. So no, Flashfire isn't an option. You also have the time bomb issue with Flashfire, but there are ways to work around that.