There are some global variables you can try:
https://docs.expressionengine.com/latest/add-ons/forum/global-variables.html
Try {forum_url} or {page_title}
Yes, this forum is EE as far as I know, or was at least in the past. I think the whole site is build with EE except the documentation which is on Github.
@slither io think get the name or title inside the URL for topic items instead of just the topic ID, you typically need to implement what’s known as “SEO-friendly URLs” or “pretty URLs.” This feature is not available by default in all forum software and may require customization depending on the platform you are using.
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