Change URL of submodules using git-filter-repo

[RSmith6055]

Hi,
Can git-filter-repo be used to change the URL history of a submodule.
I have a repository used as a submodule in a top level repository, and I need to move them both to new locations (and then delete the originals), in the top module I want to be able to change all of the history of the submodule URL to the new one. Can this be done?
I originally posted a question on stackoverflow before I was aware of git-filter-repo. The answer I've received suggests that git-filter-repo is the way to go.

I'm using Windows, and .bat files to do my conversion.

To move the submodule from server1 to server2 and change the name from sub_old to sub_new I clone the original (bare) into a folder on my C: drive, change the URL and then push up to the new server:

git clone --bare https://server1/sub_old.git c:\temp_repo
cd c:\temp_repo
git remote set-url origin https://server2/sub_new.git
git push --mirror

then delete sub_old from server1.

Now when I want to move a top level repo, which uses the sub_old repo as a submodule, to the new server:

git clone --bare https://server1/top_old.git c:\temp_repo
cd c:\temp_repo
git remote set-url origin https://server2/top_new.git
REM At this point I want to change all of the references to the submodule from https://server1/sub_old.git to https://server2/sub_new.git
git push --mirror

then delete top_old from server1.

At the point where I want to change all of the URL references to the submodule, it's been suggested that using git filter-repo may be the best way to go. I've installed it on my PC OK, but so far I've not managed to figure out how to globally change the URLs to the submodule throughout the top level repository.

Could anyone help please?

Thanks and Regards,
Roger