She joined the United Earth Starfleet, though. If someone wanted to get really pedantic, they could claim there’s a possibility she resigned her commission before the transition to the Federation Starfleet.
But yeah, T’Pol, the senior staff of the USS Intrepid, the various admirals we’ve seen in Disco and SNW, all would have joined Starfleet before Spock.
T’Pol would be the first Vulcan in Starfleet, no?
She started off as Vulcan High Command but officially joins Starfleet later on in ENT.
She joined the United Earth Starfleet, though. If someone wanted to get really pedantic, they could claim there’s a possibility she resigned her commission before the transition to the Federation Starfleet.
But yeah, T’Pol, the senior staff of the USS Intrepid, the various admirals we’ve seen in Disco and SNW, all would have joined Starfleet before Spock.