@jhpot I use Sorted3 - https://www.sortedapp.com which syncs between my Apple devices and integrates with calendars too. Tried others, including todo in Standard Notes and Roam, but Sorted3 works well for me.
Sorted³ – Hyper-schedule your entire day in one place
Sorted³ combines your tasks, calendar events and notes into a unified timeline so you can hyper-schedule your entire day in one place.