Hello Supportartist,
We want to get a little more information about what's happening to see how we can help. First, to clarify, are you referring to the iPad Pro that you have listed in your profile?
Are you running iPadOS 16.3.1 under Settings > General > About?
We want to clarify this as we do not see an eyedropper tool listed in Markup for iPad, so we want to make sure we're on the same page: Use Markup on your iPhone, iPad, or iPod touch - Apple Support
As another possibility, if you're saying that an icon looks different and you believe it might be unexpected behavior, you could always try restarting and then check again. That can help clear up a lot of general issues: Restart your iPad - Apple Support
Best wishes.