Full Screen and Focus Mode options when embedding in a Power Apps Portal

Hi,
I have created a standard Power BI report and provided it to our external Power Apps Portal team. The way the Portal team has designed the Portal means the window/frame that actually embeds the report is only 40% of the total screen. The remaining 60% is just white space (wasted space). As a result of the Portal design, the PBI report looks small and I have been asked if there is a way to enlarge the report (obviously, I've responded stating to enlarge the Portal window/frame that contains the report to fully utilise the screen's space).

Is there a way the PBI report can keep its standard 'Focus Mode' functionality when embedded in the Portal?
Is there a method, maybe a button that is clicked, I can implement in the PBI report that exapnds the reports to show outside of the Portal window/frame and show the report Full Screen?

I would imagine the Portal, being the container, overrides anything the PBI report can do but I thought I'd ask.

Thanks.