Mini DisplayPort to HDMI adapter - imac 27" mid 2010 to macbook pro m1 max 2021

This is a long shot but I hope there is an adapter out there that works because there are thousands of them and I feel like I will be searching a stack of needles to find the right one.

My question is this:

I have an old iMac 27” mid 2010, looking for a Mini DisplayPort to HDMI adapter to pair with a MacBook Pro M1 max 2021. I purchased a Best Buy brand adapter and it didn't work. Here is the kicker I also have a old mid 2014 macbook pro that I also tried to use the adapter and it didn't work either. I would have thought the older macbook would have worked. Anybody have a brand that they trust and knows it will work with the setup I have.