Maybe suggest to the host/co-host to turn them off for everyone.
1. Go to the meeting controls > Participants panel.
2. Select meeting options or Participant Privileges.
3. Disable Reactions for all participants.
OR
You could switch to content-only view or speaker view, which will minimize the reaction panel.
There is also an option to send your feedback to Webex by opening Webex > click Help > Send Feedback.