Complicated RO setup

So I've spent way too many hours researching this but feel like I'm back where I started. I'm redoing my kitchen and want RO-filtered water to go through my fridge/freezer, InstantHot, and a sparkling water keg/tap. I also wanted it to go through my pantry sink faucet but was just told by a manufacturer that this is not possible with any RO system as flow rate is for beverages, not normal sink use.

My priorities: certified to filter out microplastics, less waste water, remineralization capability

I was looking at APEC but turns out NSF has a complaint about them. I wanted tankless b/c of waste water and it seems like many of these tanks are made of plastic. One manufacturer said I need a tank if I want to connect to my fridge/freezer, but Waterdrop has a pressure water tank (made out of plastic it seems). But many of the Waterdrop comments I see on Reddit look planted.

I don't need to have the water go through my pantry sink faucet, but the others are a must. Has anyone gone through this analysis and found something that works??