Is the check bag open?

Yes

I didn't see one and in fact, if you wear a bag all throughout the institute, they will ask you to wear it on the front of you so that you don't risk knocking over any art. All the art I noticed was securely bolted so I felt like that was unnecessary and it was very uncomfortable for me.

was there friday 4-15-22. pre-visit "plan your visit" email from the art institute stated bag/parcel checking not yet open due to covid, suggested bringing only small hand held bags/purses.

You can bring small purse and/or a small shopping bag. Don’t bring food or opened drinks inside

No