Non freeware FOSS don’t exist, FOSS - Free Open Source Soft, is always free, but there are non freeware OpenSource apps, like eg. Proton VPN, which is OpenSource but not Freeware, only Freemium (server cost money), or also Filen, it’s also only Freemium OpenSource, if you need more than 10GB storage, you have to pay for it. There are also paid OpenSource apps without free version.
Non freeware FOSS don’t exist, FOSS - Free Open Source Soft, is always free, but there are non freeware OpenSource apps, like eg. Proton VPN, which is OpenSource but not Freeware, only Freemium (server cost money), or also Filen, it’s also only Freemium OpenSource, if you need more than 10GB storage, you have to pay for it. There are also paid OpenSource apps without free version.