Can alternative hosts also receive Meeting Summaries?

Hi @jarcala If the host enables sharing, meeting participants can access the summary through email and Zoom Team Chat. Anyone who receives the meeting summary may save and share it with apps and others. The account owner can access the meeting summary.

So to your case, yes, alternative host should receive meeting summary if required settings are enable and are invited to the meeting properly. More information on Using Meeting Summary with AI Companion

Here are the cases where someone will not received meeting summary: 

• Unauthenticated users will not receive an email summary, as there was no email address associated with their presence in the meeting.
• Participants joining the meeting ad hoc (through the in-meeting contact invitation or sharing the join link) will not receive the summary, as they were not on the original invitee list.