This is a fresh install and I'm logged in as the administrator and I have all the access rights. The question is about supplier pricelists, not sales pricelists.

Did you have all the technical features as well? (not checked by default for administrator). Furthermore, since in the database all the price lists will be under 1 table, it does not matter in this case if you use the view for sales or purchase. The system is the same. If you can't find any of the settings, but you can view the price list themselves in a list view, try to export that one. Then, when checking it, you can see how it is build up. You can do the same for your own price list imports.

Sorry, I wasn't clear enough. I probably shouldn't have used the word pricelist or mention that I'm able to access the generic purchase pricelists in Purchase -> Configuration -> Pricelists (so yes, technical features are enabled). What I'm talking about is found under Products -> Service (or any other product) -> Procurements -> Suppliers -> "Supplier X" and there's a list of supplier prices. It doesn't have the same kind of pricelist rules as the sales/purchase pricelists.

That makes a huge difference indeed. The naming conventions for these tables are a bit off. I'm not quite sure what the names were again, but the idea is to export a list of the partners, then alter underlying records for these and re-import. Upon re-importing the already existing partners will be updated. Use this to import this price list items and their underlying volume x price records. You should be able to add those manually and I would recommend you to do so, because that will dictate how the structure should look like when importing.