Realme phone without curved display model with minimum 32 mp front camera

it would be advisable to go with min 2024 released phones so that you get atleast 2-3yrs of security updates and for 1) min 32mp selfie and 2) 5000mah above you have the below 8 options which are curved unfortunately, you will find some in 2023 models but with Realme update policy you will end up with max A15 only for 2023 or older phones as few months back only they were updated to A14 and max security updates for next 1.5yrs when going for 2024 earlier phones which I feel is less when you are spending min 20k (alteast 2 OS and 3-4yrs of security updates makes sense for 20+k budget)

If you sticking with Realme for their UI then you can check Oppo and OnePlus (display issues though) as all three have the same ColorOs only but with different names.