I am very happy that I was able to help you. I am a new user to Clear Linux as well and am definitely not a Linux power user. I just typed those instructions to document what I did in the hopes it would help others. There was a problem with booting with LUKS for a few versions, that is now resolved. The Clear Linux team tests booting with LUKS but apparently there was an issue that was not picked up. It has been resolved and hopefully won’t occur again.
See Unable to boot after update - flashing cursor only
I am not an expert, but I don’t think the boot partition needs to be mounted once the system has finished booting and the root file system is mounted. I know mine is not either. Probably a good thing. Keeps guys like me from messing up my boot files inadvertently. You can always manually mount that partition using ‘Disks’ if you need to make any changes to them.