Hello and welcome Gabriel,
did you check if the boot.src was touched/changed? I touched my raspberry last time in last april (because i struggled on doing some vlan configs on the single network card and did not have time to investigate further) - so i would have to try it again if it is still working.
Did you also do the update i linked in my first post: RPi 4 boot failure with 162 and 163 - #9 by lincoln ?
Greetings