Outfit it with all sorts of Radio communication gear as a single large Geo-Stationary satellite platform while also outfitting it for space and earth facing telescopes and such for observations and additional science related sensor packages. And have a large Space tug/station keeping module attached to haul that up to synchronous orbit and keep that there for decades/longer.

So the The entire Space station could be outfitted with Xeon Gas storage tanks for station keeping usage and other gases for the instrument packages and that utilized for whatever needs that.

Another option is to take individual modules off and make smaller platforms for more global coverage and make more individual platforms for smaller individual Geo-synchronous orbital platforms.

One other option is reconfigure that as one giant deep space probe powered by Xenon Thrusters and slap some space nuclear reactor in that and loads of deep space antennas there and observation equipment and use an initial chemical rocket to get that up to escape velocity before that cuts out and the Xenon thrusters are engaged.

And one question, are all the modules on the Current ISS past their usable lifecycle and are no longer useful for any new station construction?