I had the chance to test this out on ARM64 architecture and it works just as well with the exception of the MariaDB ODBC connector. This needs to be built from source; there is no package available. @reraikes instructions at (Unofficial) FreePBX on Pi - #25 by reraikes explain how.
Edit: here’s a package build; just tar zxf it and then dpkg -i the resulting deb file.
odbc-mariadb_3.1.9-1_arm64.deb.tgz (89.4 KB)