So which on of these are better for my pixel 7a if we consider these:

i dont care about leaving the bootloader unlocked

i want customization to my os as long as this is possible

i hate google so i dont want any google things or google spyware (i dont use any google service)

i need push notifications for some apps (maybe microg or sandboxed google play services? idk)

i don't use esim or google pay so idc about these

i need A LOT of privacy and security to my data to the point that i want to block trackers for any app i use

i wanna use google camera as it is in stock rom but i dont want google spy shit. if i use a firewall would that be ok?

Note: i can sacrifice locking the bootloader and customization for my privacy/security/not having spyware on my phone

Thanks in advance!

Edit: i just saw that there is iodé (which sees app trackers and i found it interesting) plus CopperheadOS

Edit 2: THANK YOU ALL A LOT, your answers are the best, imma go with grapheneos and donate them also cause their job is the best

also i found this matrix for oses that helped me: https://eylenburg.github.io/android_comparison.htm !!!

Edit 3: Deleted CopperheadOS from the title - no need to compare cause it's garbage (see comments)