Find and replace regex with capturing group

In Postman, the find utility allows to use a regex to search through collections, environments, etc.
Is it possible to use capturing groups to do the replace?

Not that I’ve been able to find. I know of two common conventions for referring to capture group 1 in replacements: $1 and \1. Neither works for me.

Postman’s find and replace regex support is quirky, and as far as I can tell, undocumented. One other oddity is that the ^ beginning of line anchor doesn’t work if followed by white space (^[ \t], ^\s, or ^ followed by a space character).