This issue that is currently happening is that the card info spot is basically unclickable, thus not being able to even be filled.
I had this issue in the past and it was a caching related issue/fix. Now this time I’ve narrowed it down to WP 5.5, which once upgraded and everything else remains the same, the Square issue appears.
The current staging website that I have this issue is on has a username and password in order to access, if you’re a developer and can potentially help me, I will gladly share the login details so you can see the sites front-end looking issue.