At some point in an early 2021 iOS mobile app update, Hubspot removed the ability to edit notes -- including call log notes -- on the app. This functionality used to exist prior to February 2021, and I cannot be the only user globally who would like this feature back.
It seems that not being able to edit notes of any kind on mobile is "expected behavior" in Hubspot's eyes. https://community.hubspot.com/t5/Mobile-Application/Editing-notes-on-app/m-p/408727/highlight/true#M...
Let me be so bold as to suggest to the Hubspot development team that the ability to EDIT notes of any kind -- calls, tasks, etc. -- should be DEFAULT "expected behavior" of any app.