Elliott - figured a few things out.
In the safari settings (via the main ipad settings button) you need to disable “Prevent Cross Site Checking”
Also under “advanced” and “experimental features” you need to turn on web GL 2.0 since its off by default.
I also had to turn on Web authentication, Web Animations, web GPU, and I also enabled the CSS related settings. Now it runs smoother and saves my login information again. (At least in safari). I also disabled “prevent popup’s“ so that the preview works.
The biggest annoyances now is that I cant figure out how to drag events or resize the action box width. I even tried the new experimental bluetooth mouse support in IPADOS.
Also (and it could be my no name brand ipad keyboard) but if you are using the arrow keys to move an 8 direction or platformer object around and you happen to press 2 directions at the same time, the direction gets stuck down and the character will keep walking. Hopefully someone can confirm that for me with an authentic iPad Pro keyboard.
Also in the settings for the keyboard you might want to also disable predictive typing and auto puncutation because when typing strings in C3 it automatically adds apostraphe's for some reason and C3 won't accept the string as valid. And a heads up, C3 doesn't display a cursor, or highlighted text in any text field. Nor can you type in a field such as an array in the built in array editor window. Everything is blank.