Priscilla did teach Apollos…along with her husband Aquila1 – together, “they” taught Apollos. The fact that this married couple – together – taught Apollos, in no way necessitates the conclusion that Priscilla exercised authority over either of these two men2. In fact, examining these passages1,2 together – without Scripture weighting – forces this conclusion.
It’s entirely possible that Priscilla was stronger in the Scripture than her husband (maybe that’s why she’s listed first – who knows?). Or, maybe Priscilla only played a support role in the teaching. We of course don’t know exactly.
What we do know is that “they”1 explained the gospel to Apollos more accurately! Whether Priscilla played a lessor or greater role in that teaching, we understand she would not have done so in a way that usurped the authority of those men that were present.