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Microsoft Teams tag is mainly focused on the general issue of Microsoft Teams application troubleshooting, and not much is known about Microsoft Bookings.
Editing webinar emails is available as part of Teams Premium. If you can't edit, it may be that you don't have the appropriate license. More information, see: Manage webinar emails in Microsoft Teams - Microsoft Support [b820-daad-04a-3de9].
Currently, Teams does not support hosting all webinars in one place. You can only manually group links together and then share them with all potential attendees.
Please kindly understand that many functions are not designed at present. At present, what I can do for you is to submit feedback for your request and I have post here, and you could vote for it. If you have any suggestions or ideas, it's suggested that you could post here. Hope Microsoft will notice this in the future. Thank you for your understanding and support!
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