Merge request with multiple submodules?

Considering a repository with multiple submodules and hence multiple other repositories. Is it possible to create a single merge request that contains changes in two or more submodules. I tried to create a merge request from the parent repo, but it only sees the change the url that the submodule points to. Alternatively, I can create multiple MRs for each submodule, but then is there a way to combine these into a single merge request?