Ah. So you don't know. Or rather you think they were created as-is. I guess plate tectonics is not worth discussing then. Do you know much about geology at all?
That is assuming every mountain formed was by plate tectonics rather than having been created as is.
One that would try to fit the evolution theory into the Bible, could assume that all the asteroid impacts on earth & the moon happened at the same time, the cause and effect for the global flood, thus causing the massive shifting of the plate tectonics that created all those mountain ranges, but again, that is an assumption about how those mountains came into being when the Bible testifies how high the flood waters went as covering the mountains which would be indicative that they were there before the flood.
I could believe the asteroid impacts on the moon & the earth happened at the time of the flood, as being the cause for how the fountains of the deep rose up ( that which watered the whole earth with a mist like that mid-Atlantic mountain range making like Old Faithful ) and why that global greenhouse mist would rise up to form rain clouds for the first time by the moon which started to slowly move away from the earth due to the asteroid impacts, but applying as if there were no mountains formed until the plate tectonics moved to formed them at the time of the flood, would not align with the scriptures in the Bible to report how high those flood water had gone.
One could say the mountains were formed at the time of the flood but how would anyone know since the flood waters had covered the mountains? So they had to exist before the global flood so the survivors knew how high the flood waters had gone.
Anyway, yeah, you could refer to plate tectonics as the cause for how all the mountains were formed, but you do not really know. It is an assumption to make that plate tectonics were responsible for every mountain just as assuming every island formed was due to volcanic activity by pointing to one that formed in the ocean recently. I have not heard of any mountain formed recently unless you count a volcanic island with that volcano being that mountain.
So I am not prone to avoid evidence in nature, when discerning the cause & effect of the flood. I just do not believe in the evolution theory nor their time table since their dating methods have given errant dating results as proven within human history for why any one should not take stock in it going past known human history of over 6,000 years.
As it is, marine fossils on mountaintops and all over the world are evidence to me of the Biblical global flood but another judgment of a fiery calamity that is coming on a third of the earth. 2 Peter 3:1-18 Revelation 8:7 which will set the stage for the NWO & the mark of the beast system after the rapture.