How delete messages that appear in Phone Link but are not on my phone?

This isn't a development issue. It's a cell phone user issue. These so called unremovable messages in Phone Link are spam messages sent only to the cell phone. On my Samsung S22 Ultra 22, I open the Google Messages application and then tap the user Account icon (the circled user's initial), which will display a "Manage your Google Account" menu listing all the allowable operations for managing your Google account. Tap the listed "Spam & Blocked" action, which will open and list all the spam messages sent to your cell phone. Select a spam message to be deleted and delete the message by tapping the "three vertical dots" at the top of the display which will then open a menu of actions that can be performed on the selected message. Tap the Delete action, which opens another display to confirm the deletion of the message, and then finally tap the Delete action. The message is removed from the cell phone and will disappear from the Phone Link.

I found that you have yo go to messenger on phone and go to unknown in the search box, then delete the messages.

These are normal messages from businesses and people I know. Not SPAM. You can only hide the message, not delete it. I want to know how to delete hidden messages

In Phone Link on your PC, scroll to the bottom of the message sender icons on the left side. If you have hidden messages you can unhide them, then delete them on your phone. I've not found a way to delete non-spam messages using the Phone Link app on the PC.

reply was very helpful