Anything is possible, but here is my problem with the 14”:
It made sense to upgrade the 15 to a 16 because for years some people were missing the 17”. So this was a way to give the big MacBook Pro crowd a happy medium. They had to make the 15” a little bigger and heavier to make this happen, but it was already big enough that the difference wasn’t enough to cause problems.
But with the 13” the size is pretty optimal. I’m not sure a lot of 13” MacBook Pro users would be happy if they made it bigger. They could eek out a little more screen size by reducing the bezels, but I don’t think they will do that until they can do it without sacrificing durability. I’m sure as material and screen tech improves they will update; but I bet not in 2021.
Apple has a lot of work ahead of them on new Macs this coming year. They need to launch new iMacs, the 16” MacBook, and the higher end model of 13” with 4 thunderbolt ports. This will require shipping something like a “M1x” chip and possibly a discreet GPU. I think they will be too busy to bother putting out another 13” pro when the existing form factor is so good. If they were going to, this would have been the time.
I could certainly be wrong though