Thanks for attaching your bundle! I did some experiments:
• I could install the bundle (Sonoma 14.3.1 here) but none of the three layouts contained in it showed up in the list of Input Sources in the System Settings.
• This didn’t change when I removed the two layouts with "funny" names.
• When I added another layout (a known-good one) to the bundle, set its Language to "Cree" and installed the bundle, only that layout showed up in the list.
So I conclude that your procedures are OK, but the keyboard layouts are somehow faulty.
When I open your layout in Ukelele, I don’t see anything special, except maybe that you have "empty" Dead keys on Option-z and Option-. (full stop).
I’m giving up for now…