I have the same issue on 7.1.35.
Editing the Debian control file and running dpkg -i worked for me. And prevents dpkg from complaining about unmet requirements
On Windows 11 WSL2 Ubuntu libc6 dependency was not met so I had to fix that too.
$ dpkg-deb -R foundationdb-clients_7.1.35-1_amd64.deb temp_dir
$ code temp_dir/DEBIAN/control
$ dpkg-deb -b temp_dir custom_fdb_clients_7.1.35-1_amd64.deb
$ sudo dpkg -i custom_fdb_clients_7.1.35-1_amd64.deb
dpkg-deb: building package 'foundationdb-clients' in 'custom_fdb_clients_7.1.35-1_amd64.deb'.
This is how the control file looks after setting the Architecture from blank to amd64:
Architecture: amd64
Depends: adduser, libc6 (>= 2.12)
Description: FoundationDB is a scalable, fault-tolerant, ordered key-value store with full ACID transactions.
FoundationDB is a scalable, fault-tolerant, ordered key-value store
with full ACID transactions.
.
Homepage: https://www.foundationdb.org
Maintainer: The FoundationDB Community
Package: foundationdb-clients
Priority: optional
Section: database
Version: 7.1.35
Installed-Size: 164663