Stack on a gravel bike might be tough to overcome with buying cheap super-drop stems or using clip-ons.
I'd say for sure you'd be looking at buying a pretty negative rise stem to get the stack down enough to be worth it.
Gravel/cross bikes have a lot more front end than do road race or even endurance road bikes.
IMHO, now that you bought it I'd sell that road bike and pickup a "project" bike to fix up.
FWIW I pretty much now own an older "super bike" TT bike because I was willing to do carbon repair on something someone else wanted to trash.
If you learn to do stuff like that, and shop sales or Ebay and learn what "open mold" parts to trust........you can get an awesome setup for a good price.
I've got about a $1k total in a Felt DA with disc, trispoke, and integrated modern cockpit.
You can find used decent condition P2 framesets for like $350. About one of the fastest budget tri bikes you can do.