@Audi86 so I'm clear, you want
- Asset reliability selects manager (do they also select asset?)
- Based on selection, show license(s) and associated users (do managers have more than 1 license assigned?)
- Auto-generated email to manager for selected asset, seeking if user(s) still require
- Manager then selects yes/no (by check box or other means) for the asset
- Once completed, notify someone?
Based on my assumptions and exposure to similar process it might be best to consider a workflow on a schedule vs manual kick off. Less hands on. Then you could build in notifications based on process breaches or certain conditions. You'll want to track process status in case one of your actors is non-responsive (or is no longer in that role).
Have you considered your technology options? Thoughts about power apps? Thoughts about Teams? Or SharePoint/email/power automate all we got to work with here? (If so, why? :) )