I've been crawling through getting Ubuntu installed on my Mac. I'd like to have it dualboot but keep running into small issues. So far ...

-rEFInd shows on my mac! SIP is disabled and launches with every boot, so no stress there - I've managed to properly format and use the space on the drive to run Ubuntu, and can see the content in the "try ubuntu" os, so i know it's installed - when i boot and have my options, it shows the USB loader just fine, shows my mac os just fine, but no ubuntu - when i first installed rEFInd, the install of ubuntu on my internal ssd showed and booted without issue

internal ssd is 500 gb, 16gb ram.

There are 3 partitons on the internal SSD - the macOS (250gb), Ubuntu, and a 4gb FAT for easy data transfer between the two

it stopped showing the ubuntu partition after booting to the macOS (nothing was installed!), but still launches into rEFInd without issue

Is it possible I need to configure something to get the installed drive recognized? I'm still new and learning, and didn't realize I needed rEFInd until after my initial boot (which, again, after first installing it showed ubuntu).

I've seen similar posts with people having similar issues, but no luck in solutions. If you have any advice or need any further information, please let me know!