I always viewed the think pad line as more of a business line of products. I know it isn’t owned by IBM anymore, but considering how much involvement they had with Redhat, you might have better luck trying a fedora based distro. I’m running fedora Fedora 40 beta plasma and it was basically install and start working.
TrueNAS is switching apps from kubernetes to docker. Might wait till October if wanting to spin up something new. I’ve got to figure out how to migrate my TrueCharts apps or find the equivalent when the time comes to upgrade