I see nothing in Ubuntu/Debian (no reference I used in my earlier comment) so as I suggest you provide details as to what you are trying to install, and why you need it.
My guess is it’s something old, python2 is EOL but you’ve provided no details. I would suggest looking for a more recent version (and avoid python2 if security matters to you)
Did you look at https://packages.ubuntu.com/groovy/libicu-dev I provided earlier? which is the current version of what you’re likely looking for…