Nor does the Bible specifically say “Trinity” - yet both doctrines are taught. And while Christ wasn’t married Peter sure was.
That's an indictment of sola scriptura, not an endorsement of it.
And while Christ wasn’t married Peter sure was.
The Bible mentions that Peter had a mother-in-law, but says nothing about a wife -- he could have been a widower and still have a familial relationship with his mother-in-law. To get a clear statement that Peter was married both before and after Jesus' public ministry, you have to turn to extra-scriptural sources like Eusebius.
As far as the Trinity: Jesus referred to His Father multiple times as well as referring to the Paraclete. The Trinity is implicit in the Transfiguration.