I think the problem is not in your apache config but in Telescope itself! Telescope is a Single Page Application build in vue. The routing on that page is handled by vue itself.
So you need to set the path in the telescope config file. If you haven't published the config file you have to do that first (check the docs for that). After that you can set the config in that file to the following string
laravel/telescope
Source: https://github.com/laravel/telescope/blob/2.0/config/telescope.php#L32
I guess that should work for you ;)