Colleague set up a webinar before transferring control to me, but webinar has now disappeared

Colleague set up a webinar before transferring control to me, but webinar has now disappeared - can no longer be seen in either my colleague's or my webinar list. Invitations have been sent out automatically via a connection with Hubspot, but now I have no idea where the webinar has gone or how to get it back.

AI bot is useless and keeps telling me to click on unlinked keywords for unrelated support docs, so I could use some help.