Update Yes/No field if Date is today

I am trying to create an automated SLA field

I have a “Date Requested” Field and an “Outside of SLA” field.

Date Requested is formatted as a Date, Outside of SLA is formatted as a Yes/NO / True/False field.

I am trying to automatically update the “Outside of SLA” field if the “Date Requested” is later than “Today”

I understand it will have something to do with the IsToday() field but im not sure if the logic i am trying to apply will work within PowerApps/Sharepoint.

Is this at all possible? I feel like i am treating this too much like Excel but am pretty new to this. Apologies

Thanks for any advice