I believe the blood pressure increasing effect of psilocybin is very mild. It’s not even that uncommon for people to have fainting spells from mushrooms, which seems possibly more indicative of a blood pressure drop.
That being said, it could affect you more significantly if you already have blood pressure issues. It’s not the most dangerous psychedelic in that way though, and rather may more likely be one of the safer ones. I would avoid some of the synthetic derivatives if you’re concerned, though. For instance, my father who was in his late sixties at the time and taking medication for high blood pressure once took a full dose of 4-HO-MPT and briefly had a blood pressure reading of 200/100. Nothing happened to him, though. He has a history of having very high readings to the point that doctors have been afraid of letting him leave the office before because they think there’s an immediate threat, but to this day it’s still been nothing but a number. But of course that doesn’t mean it’s not concerning and I do understand the fear.
Good luck in whatever you choose to do.