Reposting this as I've not been able to get an answer.
Basically Omnichannel Insights for Dynamics 365 cannot be filtered to local timezone, where as reports such as Omnichannel historical analytics and Intraday Insights both contain filter to select local timezone.
I've attached screengrabs to describe the 3 different reports.
1. Omnichannel Insights for Dynamics 365 - PowerBI Dashboard embedded in Omnichannel for CS application:

- Time zone filtering by UTC only which skews conversation data by 10 hours
- Can open and edit in PowerBI however requires customisation to the pbix
2. Omnichannel historical analytics dashboard:

- Uses GMT for time zone filtering which is 'correct' (ie: doesn't require customisation to show conversation date data in local time zone)
- Unable to open in PowerBI and limited filtering in Omnichannel for CS application
3. Omnichannel Intraday Insights - PowerBI embedded in Omnichannel for CS app:

- Uses GMT for time zone filtering which is 'correct' (ie: doesn't require customisation to show conversation date data in local time zone)
- Can open and edit in PowerBI however requires customisation to the pbix
Our supervisors see Omnichannel insights for D365 on loading up the app. This erodes confidence in the data/reporting if it is unable to be filtered to local time zone.
Making available a GMT filter in all insights reports would solve the problem.