It’s been a while, hope you and the family are doing well.
We’ve done a bit of work on cookie notifications and to be honest… nothing you can test is really going to move the needle that much.
People are pretty much “blind” to these so unless you make it a requirement to select an option before you can proceed, most will ignore it. There are obviously dark patterns with this and a lot of misinformation on the web.
Look into alternative analytics platforms that don’t require optin and that don’t collect PII. Either server side or something close to it like Cloudflare analytics. UseFathom is another option that doesn’t require an optin. The issue with these is that they are pretty limited compared to Google Analytics.
Look into Google’s Consent Mode - you might be able to get some more data even without consent.
You might be able to get more acceptance of analytics tracking if you separate it from the rest of the tracking. Certain cookie notification bars allow the user to select different levels of tracking (Marketing, Retargeting, etc.)
As always, consult with a local attorney if in doubt since there is a lot of information on the web but most of it is either trying to sell you something or simply wrong.