Front derailleur compatibility (in regards to groupset) relates to the chain, the crankset and shifters that are used. The 10 speed chain is almost the same width as a 11 speed chain, so I don't expect any issue (even though the compatibility chart you linked to does specify to use a 11 speed chain).
Your crankset is a FC R7000, which is already within the same groupset as the FD R7000. Which also means you have a front derailleur that is currently compatible with the crankset, and in turn shifters that are compatible with the current front derailleur.
If I upgraded the FD as well, would that be compatible with the rest of the system in 10 speed?
Yes, I don't see any issues in compatibility across your components.