I have created the wiki page https://wiki.openstreetmap.org/wiki/Tag:shop%3Dcondo to document current usage.

The question https://wiki.openstreetmap.org/wiki/Talk:Tag:office%3Destate_agent linked by skdf hasn't been answered since March 2024

If you wish to discuss further, may I suggest the Community Forum and/or tagging mailing list, and link here?