Hi, Dave,
You had asked for clarification regarding the logos to which I am referring. You are correct in saying that they are the ones for the external websites that one accesses within 1Password.
Now I will check out your rich icons database, but I am afraid that no one is going to get rich mining it - pun intended! No offence intended, but most of the stock icons offered within 1Password do not reflect the same attention to detail and quality as the rest of the app. They either are lo-res, so they look fuzzy on hi-res phones and monitors, or they are woefully out-of-date (i.e. companies do periodically update their logos) or they are formatted improperly. They need to be) to be of a sufficient size ( i.e. 500 x500 pxixels) and be PNGs rather than JPEGs.
A JPEG is simply not going to work well in the dark mode because jpegs do not allow for transparency. If one wants interesting, high-quality icons that work well in both light and dark modes, they are going to have to be formatted as PNG's. Otherwise, we are limited to boring box-shaped icons surrounded by a lot of bright white space, and these icons are an eyesore on a dark background and produce eye strain.
So, to answer your other question, of my roughly 150 icons, many of them are just replacement icons for those that install automatically with 1Password. Others are ones I have had to find or create for myself because they were not available in 1Password.
And yes, I do realize, Dave, that not everyone cares whether the app looks as good as it functions. But there really is no reason that your app can not be both beautiful and functional. And I don't really mind scouting out good icons for it because it is without question, my most frequently used app and the one app that I am most inclined to recommend to friends.