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Samsung phones can survive twice as many charges as Pixel and iPhone, according to EU data
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
I had the same phone, and the only reason I replaced it was because the USB C port was finicky. It must have been damaged at some point and when plugged in, the cable had to be just right. Wireless charging works great, but I wanted the stability of being able to plug in and know it would discharge over night when I didn't have a wireless charger. Otherwise, I had no issues with the battery, and I got the phone when it was pretty new to the market. I swapped it out just a few months back, and it's going to be my test phone for grapheneOS and may end up being a communal remote.
(Not saying this was your case, but generally good to check) - a finicky/wobbly USB type c connector has been a symptom of a dirty charging port several times in the past. Awful lint/dirt would get packed down into it, preventing the charger from fully inserting.
I ended up carefully and gently picking it out, though there are some delicate small contacts in there!
Anyway, good luck trying GrapheneOS! It's been my daily driver for months and past the learning experience it's great!