Incoming Webhook to @mention a Bot

We have some messages that are arriving in Teams channels via an incoming webhook. We'd like to @mention a bot that is also in the channel so it can see the message. I've found some documentation on mentioning users via a Webhook but it doesn't seem to work for bots that are in the channel (I've tried both the Client ID and Object ID in Entra for the bot). Does this work? The documentation that I've been looking at is here:

https://learn.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/cards/cards-format?tabs=adaptive-md%2Cdesktop%2Cconnector-html#user-mention-in-incoming-webhook-with-adaptive-cards

Thank you!