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I just found this by accident ... Looking at the policy, for purposes of the US, disclosing the use of the client ID to combine your sessions that start with AMP sessions in the Google cache with sessions that continue on your main site, requires only that you disclose that in your privacy policy.

The EU issue is the trickier one I think, and I'm no lawyer, and can't therefore give legal advice. What I've noticed though, is that lots of sites now put a message on the bottom of the browser window telling you something like "By using this site you are consenting to the use of cookies" or something along those lines. I wonder if they are doing that to meet the spirit of the EU regulations? I'd be interested to see if you learned anything since you posted the question above.

EGOL has it right.  Should not need any targeted SEO to rank for your brand on the home page. But, for that reason, you should work on getting your home page to rank for non-branded terms in addition.  I would include those in the title tag and an H1 tag on the page (I don't think it matters any more if it is H1, or H2, or H3, by the way, but some heading tag).

Put the major non-banded keyword to the far left of the title tag and the heading. Brand name at the end.

Also, the heading tag and the title tag do not need to be identical, so you can use different variants of the non-branded keyword in the title tag and heading.