Welcome to the forum @moscowtrainer
We have noticed that Niantic has been removing similar graffiti. I can’t tell you if this was some kind of internal process, or if it was seen as a nearby Wayspot during review and reported for removal that way.
I am not very familiar with street art where I live, but this doesn’t seem to be up to the standards shown in the clarification:
I know this is a difficult change if this kind of art has been generally accepted in your area in the past.
(I confirmed I could not see this on iitc. I do not have the Wayfarer app, so can’t check if it exists there.)