People on here have said you can,t use it the Apple Thunderbolt Display with newer Mac,s but here is a video of someone using a 2019 Mac Book Pro with it, I am a bit confused I know that the target display mode does not work with later models. It would be nice to hear a definitive answer. 
Here,s another
video on it
some people in the comments on the video say it doesent work.
video on it
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