apt repo for percona 5.7, libjemalloc:
https://repo.percona.com/apt/pool/main/j/jemalloc/
libjemalloc1 is only delivered up to Ubuntu 20.04.
For Percona 8.0 is generally uploaded and not per distribution:
https://repo.percona.com/ps-80/apt/pool/main/j/jemalloc/
Could you fix that?
The Ubuntu repository has only libjemalloc2 available, I could not find anything that the version is compatible with Percona.