Update email to tenants when a new document is added to their tenant area

What we really need is to assign a document to a Property and then for LV to have the option to AUTOMATICALLY share it with EVERY tenant at that property. So that when a new tenant moves in they are AUTOMATICALLY able to view the document. For example Gas Safety Certificates MUST be shared with all tenants, it is tedious in the extreme to have to a) enter each each tenant each time a new Certificate is entered and to have to remember to share existing Certificates with each new tenant.

When there are new important documents like  Gas Safety Certificates, all tenants at a property should also automatically get an email to inform them that there is a new important document for them to look at.

yes all but 1 of my tenants have registered to their tenant portal but when I upload a new document which is shared with them they have no knowledge and I find once registered they never bother using it again we 1) we have no idea of when the tennat last logged in 2) they need to be automatically notified by email when a document is shared with them 3) if there was a tenant app they would be notified of a change or addition