Static page with a prefix/dynamic URL

Hi,

Is it possible to create a static page with a prefix URL? maybe with regex?

for example:
All URLs with URI starting with /a will go to the same static page
https://mydomain.com/a/b
https://mydomain.com/a/b/c
https://mydomain.com/a/b/c/d
https://mydomain.com/a/e/f

Currently, if I define the slug to be ‘/a’ it will catch only https://mydomain.com/a and all other URLs go to the 404 page.
Also, I tried to define the slug using regex to be https://mydomain.com/a.* but it does not let me do it.

Thanks


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