Where are the branding capabilities in Learn?

We want Learn to appear as our corporate resource to users. Therefore we require the ability to brand - not just a custom domain, which is also necessary and we see how to do that (thank you). Specifically we need to know how to do the following:

Change site banner color to our own desired color (hex) - this is important!
Change site logo and favicon - found it once, uploaded successfully and no change + can't find function again.
Add images to Manuals tiles - is this really missing?
Color Manuals tiles - nice to have, is it available? coming? when?

After that we can look at the training components which should have same capabilities. We do understand that training is limited to Zoho Users which is a poor fit for us to deliver training to our customers. We need a way to share our content with external, non-zoho users - OK if we have to grant permission (better ir not required).

Thanks in advance

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