No, don't do that. That's how you break your system:
https://wiki.debian.org/DontBreakDebian#Don.27t_make_a_FrankenDebian
It looks like pika os is based off of debian sid, which is not compatible with debian stable.
If you want newer packages on debian stable, try backports or experimental, which target the debian stable repos and are guaranteed to be compatible and explicitly tested against with debian stable
Otherwise, it's best to switch to a distro or release (like switiching to debian sid. Don't use testing though). Or you can use distrobox/containers.