I think these were the ones I installed https://wiki.lineageos.org/gapps/
My Poco X3 Pro has been having annoying ghost touch issues for a while, perhaps the time has come to look into an alternative.
I run LineageOS on my phone (with gapps) and my tablet (sans gapps). If Google tries deleting stuff it doesn't own on my phone it's LineageOS sans gapps for my phone and probably buying a phone for GrapheneOS.
No hardware RAID. Use zfs, if you can. Mirror the boot SSD. I would use a stripe over mirror and 4 HDDs. Two drives are not enough redundancy.
Use enterprise or nearline drives, if you can.
Debian is great, you can install Proxmox on top of it, but from the sound of it plain Debian would work for you.
I also thought they wouldn't, but it was semaphored clearly well in advance and it absolutely makes sense given it's West vs. rest of the world war with Russia, China, Iran and North Korea leading the pack. So far it's a war of attrition the West is clearly losing. Let's hope it won't come to a nuclear escalation, where everybody is losing but Death.
They could just take out logistics hubs like railway tunnels and the Odessa port, and destroy the rest of the power plants with few kT tactical nukes. Minimal direct casualties, but plenty dead in the aftermath.
It's the AI version of the human centipede rather.