Lock on Session End no longer available Mac 11.1

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I'm connecting to a Macbook Pro running TV 15.13.7 on OS 11.1. In the last month or so (I haven't traveled in awhile so I'm not sure exactly), I no longer have the option to lock on session end when connecting from my Win 10 64 laptop running 15.13.6. I've always used this option to ensure the kids can't access the computer after I'm done with it, but now it leaves it unlocked.

The Windows settings have an advanced option for "Lock Computer," but I didn't see one in the same location on the Mac. the button is in the normal location on the toolbar, but it's greyed out. When I expand the actions, the "End session and lock remote computer" button is also greyed out. I searched the forum and didn't see anyone else experiencing the issue.

Is this an intentional change, and is there any way to allow the computer to be locked on session end?