What Bluetooth mouse will work with an iPad and which won’t?

Hi all. I’m struggling to find information as to which Bluetooth mouse (mice? Mouses?) will work with an iPad and which ones won’t. I’d really like to pick up an inexpensive one to test out as I feel like that will make my iPad (6th gen) the only thing I need in my bag. I understand a mouse isn’t necessary, but I’d like one. I’m hoping to find general information, like what to look for and what to avoid, but I’m open to specific suggestions as well. Thank you in advance!
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