How to export following info from a room mailbox
1. Who has booked the room
2 pm to 3 pm
Item-level details such as information about specific meetings are not exposed directly via PowerShell. You will need to use a solution based on EWS or the Graph API, here's a sample one: https://letsexchange.blogspot.com/2017/05/exchange-meeting-room-statistics.html?m=0
If you want to export this information with PowerShell, you will need to use EWS as michev said. I will help you add Exchange development tag to this thread.
If you just want to check who booked this room, you could add your mailbox to this room mailbox's full access list, then you will could open this room mailbox and check from it directly.
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