They are system apps and I doubt if we can build them. It makes no sense to use Vanadium on other ROM. You should use Bromite instead. But we don’t have it either because we are not capable to build it.
IMO, Graphene (Micay) has never been one to “collaborate” with other projects much, but, back in the Copperhead era, they included F-Droid and privileged extension. (Legacy changelog | History | GrapheneOS)
Graphene (Micay) has no problems with proprietary apps, but currently leaves it to users to install app stores of their choice, including Google Play. (Usage guide | GrapheneOS)
GrapheneOS is also working on designing and implementing a first party app update system for a first party repository with higher robustness and security than the existing options. (Frequently Asked Questions | GrapheneOS)
You could look at DivestOS. The developer seems more principled regarding F/LOSS, includes their own webview and bundles mostly AOSP/LineageOS apps, puts some apps into F-Droid, and runs their own F-Droid repo as well.
Edit, Adding: Here are a few apps related to LineageOS in F-Droid. Maybe there are more, but the search… could be improved. (F-Droid Search: lineageos)