I can see the pin in your example link in Brave. Since you mentioned you were able to see it before, you might want to try clearing your browser’s cache and cookies if you haven’t done it in a while. This tends to resolve issues with websites not displaying as they normally do.
Thank you for the confirmation that this is a problem on my side, I will look for a solution. The weird thing is that I even uninstalled and reinstalled Chrome before reporting the bug (which was therefore not a bug, ultimately).
It sounds like this might be an issue with the Google Maps API itself. I tested in Safari and Chrome and didn’t see the pins, but I could in Firefox. I’ll need more time to research this.