As per the HOA Board vote of November 3, 2021:
For now, until further discussion, no signs will be allowed on common areas in the neighborhood except those recognizing neighborhood graduates and notices of board meetings.
Addendum: resolution voted by the HOA Board on January 11, 2022:
If anything is put in the common area that is not approved by the Board, the Board will use all official Board channels to contact the homeowners to ask for the item to be removed within 72 hours. If it is not removed by the individual who placed it, the Board will remove the item and store it. Homeowners can reach out to the Board to retrieve their property.