I don't know if it's the right way but I got my one like this. To get Listed as a StreetView Photographer :
Publish fifty approved 360 photos.
All approved 360 photos must meet the following criteria for image quality, connectivity and appropriateness. For complete requirements, see the Google Maps Image Acceptance & Privacy Policies.
After publishing the 360 photos Turn ON the FOR HIRE button from the settings of STREET VIEW app.
As soon as you Turn ON the FOR HIRE button you will get an INVITATION LETTER for STREET VIEW TRUSTED PROGRAM.
5. Check your E-Mail for the INVITATION LETTER.
Fill out the form from the INVITATION LETTER.
After filling out the from it took 1 Month for me to get listed in the for-hire index also to access the Digital Badge.
Support and Community: besides the Help Center link above, you can always check the Google Maps forum to ask advice from other photographers and check the Local Guides community, for inspiration.