Yep my son was slower on speaking - he understood a lot, but said very few to no words until up until after his 2nd birthday.
The pediatrician recommended speech therapy when he hit 2 (which we did for a couple months and I think helped a little), but he also just naturally started using more words and is now caught up and chatty.
Definitely get the worry - I felt the same way - but I don’t think you necessarily have anything to worry about yet as it seems like there’s a spectrum of what’s normal on this front.