It’s a big pity… As already discussed here or on github, the bit operations are nowhere as convenient as an intrinsic BIT type could be.
And the bitset user derived type of stdlib shows that there is some demand. But again, a user derived type is not as convenient (and it relies on some assumptions, such as the 2-complement internal representation for the integers, and on representations that are possibly outside of the Fortran model for the integers…).
Not to mention that some compilers in the past did have a BITS type, if I remember correctly.