Re: HareRe: How to I see or change the timezone of my Environment?
In general, yes it is converting the timezone automatically. SharePoint actually stores the date/time in UTC, but displays it on a SharePoint page in the default timezone for the SharePoint server. This can be overridden in the site settings or the regional settings of the user. It evaluates in the order of (SharePoint, site settings, user settings) with the last one found taking precedence.
Power Apps knows that the time in SharePoint is stored in UTC so it will also try to automatically convert it to the regional settings for the User in Power Apps. These settings can also be changed in Power Apps but will normally default to the browser settings.
AS you can see its tricky because there are a lot of different layers that can affect the date/time. Doing a deliberate conversion is usually the only way to get control.