Ok, just devided to give testrun of one flow. When I deploy it I get message: Flows stopped due to missing node types. Check logs for details.
If I check with: sudo journalctl -f -u nodered -o cat
I see:
25 Jan 23:16:38 - [info] Stopping flows
25 Jan 23:16:38 - [info] Stopped flows
25 Jan 23:16:38 - [info] Waiting for missing types to be registered:
25 Jan 23:16:38 - [info] - scan ble
I see also 1 unused node which is hidden so cannot remove.
Anyway I will read things up at weekend or next week and hopefully will getthings working.
Thanks for all the help. Eventhought I finally got this far by trial & error method, but it’s always nice when someone tries to help. 
Edit: This is getting really annoying. I did got that node installed & appesaring at UI when installing via GUI at browser, like said earlier. BUT No when opening browser again and go to Node-RED, that node-red-contrib-noble is still installed when checking through GUI, but it’s not usable at Node-.RED UI.
So frustrating to fight against basic things. First node can be installed via command line like it should but doesn’t sppear at UI, then workaround to that and now this. I would like to use my time to study Node-RED & other things instead.