It is up to us. I recently submitted changes and new "working" repeaters for central California. At the time of my submission only a dozen were listed for 2m & 70cm. It now includes 6m and 1.25m. I have even more to submit with 33cm as well as digital variants like DMR, D-STAR, and C4FM.
If you do submit frequencies ensure you double check after it is posted. I am finding errors as well as changes to repeaters that were not done but doubled up with the correct info. Bad data is not good.