Issues and solutions for Date and Time fields for Power Apps and Power Automate
1. Time zone issues-
If you find that you have converted your time zones in your flow and they are still not dislaying correct in SharePoint. Make sure the time zone in your SharePoint site is correct. It could be default to the wrong time zone no matter where you live and set it up.
Check your site's time zone at: Site information>View all site settings>Regional settings
When a user modifies their trip record and the "Would you like to cancel" field/choice column is equal to "Yes" (really field value: 115650000) then delete that record from SharePoint Calendar and the dataverse. This flow also send a email notification to the user and the person in charge of trip reservations.