In dwelling units, hallways of 3.0 m (10 ft) or more in length shall
have at least one receptacle outlet. As used in this subsection, the
hallway length shall be considered the length along the centerline of
the hallway without passing through a doorway.
At least one receptacle outlet shall be installed in bathrooms within
900 mm (3 ft) of the outside edge of each basin. The receptacle outlet
shall be located on a wall or partition that is adjacent to the basin
or basin countertop, located on the countertop, or installed on the
side or face of the basin cabinet. In no case shall the receptacle be
located more than 300 mm (12 in.) below the top of the basin or basin
countertop. Receptacle outlet assemblies listed for use in countertops
shall be permitted to be installed in the countertop.
The above is 2020, Minnesota. https://up.codes/viewer/minnesota/nfpa-70-2020/chapter/2/wiring-and-protection#210.52
The mudroom will have the 6 ft max to a plug requirement.
If you put an outlet within 6 ft of the shower it must be GFCI.
I've never lived in a house where I thought there were enough outlets.