Yes, you'd need to raise a new bug if you can't comment. But do note that bugs have been closed as WONTFIX or INVALID for a reason so simply opening new bugs to complain about resolved issues is not constructive.
Bug 1887304 Comment 1 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Yes, you'd need to raise a new bug if you can't comment. But do note that bugs have been closed as WONTFIX or INVALID for a reason so simply opening new bugs to complain about decisions made for good reasons is not constructive.