Google Clarifies Phone Numbers Are Not Allowed in Google My Business Posts
https://localu.orgGoogle has finally added this to their guidelines.
In the help article on Google Posts policies, Google has added the following:
Phone stuffing
To avoid the risk of abuse, we do not allow your post content to include a phone number. You can make your phone number available on your Business Profile or website.Instead, you can attach a “Call now” button to your post that uses your verified Business Profile phone number.