1. MTB's cranks usually have a 42 or 44T big chainring and a 20 or 22T granny while road cranks have 50 to 53T big rings and a 30T granny. The larger chainrings may not clear the frame's chainstays since MTB frames often have fat chainstays that are flaired to clear fat tires.

2. You will probably need a different bottom bracket. Your bb shell may be either 73 or 68 mm wide. All road cranks are made for a 68 mm bb shell so your chainline may be off.

3. You will almost certainly need a longer chain to make up the 6 to 11T big chainring difference.

4. Your front derailleur cage won't be curved to match the larger chainring and will have to sit way too high to clear it so shifting will be very poor. A road fd will be needed to shift properly but won't index correctly with your MTB shifters.

I think looking for a mountain bike 48 tooth crank is a better choice. There are such sizes for mtbs.