Enroll all group members into each session

We have an RSS that runs on cohorts – so a new version of the series starts each month with a new group of learners. It’s mandatory (at least in theory), so everyone is supposed to attend every session for their cohort. It would be great if I could add people to the RSS group (e.g. July 2025 Cohort or August 2025 Cohort) and then click a button to enroll them in each session without having to do an import.

After each session, I cross-reference my attendance list with who submitted the enrollment/attendance code and add in anyone who missed the deadline to submit the code. It would be great if all I had to do was scroll through the list and just mark people attended instead of also having to register them.