No. I’m waiting for the original author to transfer his repo, he’s slow to answer unfortunately. Meanwhile you can install from his, see this thread.
You might also be able to fix your install, unless you deleted binaries or directories I believe all you need to do is fix /etc/ztab (if you changed it), re-enable and reboot. The original is at /opt/openhabian/includes/ztab. I’d suggest to increase disksize for /var/lib/openhab2 to 600+MB while you’re at it.
No, you need to stop and eventually reboot. See if df and zramctl show any remainders.
Anything else I’m afraid likely is no zram issue.