Did I break my keyboard or my motherboard?

The model I have is slightly different from the one in the title, it is a Zenbook UX433F, although I think the only difference is the color (mine is blue).

I was cleaning and repasting it, following a couple of youtube tutorials, none of which showed that you need to unclasp the keyboard connector before unplugging the ribbon cable. So, I just pulled it out without unclasping it.

After reassembling it, the keyboard was actually working okay for a few hours before certain keys stopped working. In my infinite wisdom, I thought that I just didn't reconnect it well, so I actually forcibly pulled it out and re-connected it AGAIN without releasing the security latch.

In my defense, I couldn't find any kind of official disassembly manual. Lesson learned.

At this point around 20-30% of keys aren't being detected (I can list them out if necessary). If I push the cable at certain angles, I can get some keys to start working, but not all of them, and there doesn't seem to be any reason behind which angle activates which key.

I'm thinking of just replacing the entire keyboard at this point, but I'm also afraid if I actually broke the connector on the motherboard, and not the ribbon cable.

So, is there any way for me to check if I broke the keyboard or the motherboard connector, without buying a new keyboard?