Hi @uj_r,
Official packaged binaries for MongoDB target server-class environments which unfortunately have more modern microarchitecture requirements in MongoDB 5.0+ than the current generation of Raspberry Pi CPUs (per the information you’ve found).
Your options are as per Core dump on MongoDB 5.0 on RPi 4 - #14 by Stennie_X
I’m not aware of any current plans to add newer binary packages targeting Raspberry Pi microarchitecture, so using MongoDB 4.4 binaries would be the most straightforward solution.
Debian packaging files are available in the debian directory of the MongoDB source code on GitHub:
Regards,
Stennie