Divert to custom rom, for A14 and security updates, if u can put effort to installing one.(**Also Google safety net api dependent apps may not work without trickery)

Best choice if u don't use Google safety net api dependent apps.(stock LOS without any key attestation tinkering)

Official listings of update policies for different Samsung devices:https://security.samsungmobile.com/workScope.smsbIssued update listings of m52 5g:https://doc.samsungmobile.com/SM-M526B/INS/doc.html

No 2 and 4 is not applicable to my device(m52)

Might be a chipset issue or licensing issue to activate 5g features(speculation) with sd750g, because smartphone from another vendor Motorola Moto g 5g denied for jio 5g SA support (got Airtel 5g NSA support, as f23 also got it) due to hardware limit...