I just bought Minecraft windows 10, can I link it to a Mojang account?

no as it is the bedrock edition not the java edition.

Please check under https://account.microsoft.com/billing/orders/ if your purchase for Minecraft Windows 10 shows up.

Be aware that Minecraft for Windows 10 is different from Minecraft on Xbox and also different from Java Minecraft on PC. If you bought Java Minecraft BEFORE Oct. 2018, you need to sign into your Mojang account on the Minecraft.net website, and can redeem
a code for Windows 10 Minecraft.

After you got Minecraft for Windows 10, make sure you sign in with the same account that you bought it. Open the Windows 10 store, check that's the right account in the upper right.

Then open the menu and check your library. If you bought Minecraft 10 with that account, you will find it there.

The Java version of Minecraft needs to be bought through Minecraft/Mojang's website, as just a heads up. You can find it at the link below. Please make sure you get that refund for the Windows 10 version first though. I feel like that's the bigger fish to
fry right now in your case. Keep in mind you need to register for a Mojang account before you can move on to the buy and download page, so do that if you haven't already too.

https://my.minecraft.net/en-us/store/minecraft/#register

When you redeemed your Java Minecraft on Mojang, you have gotten a 5x5 code to redeem Minecraft on the Windows 10 store.

This redemption is a separate service of your Mojang account, and it's possible to use a Microsoft Account email that is different from your Mojang account email.

Mojang (which gives you Java Minecraft) is separate from the Microsoft Windows Store App, which uses a Microsoft Account email when you redeemed that 5x5 code.

After redemption of that code, the Windows 10 Minecraft is tied to the Microsoft Account email you used on your Windows 10 PC. From then on, you don't really need the Mojang account anymore, if you only want to play on Windows 10. You will then get the game
from the Windows 10 store only, with the E-Mail account you used on the Windows 10 store during code redemption.

So make sure you are signed in with the Microsoft Account email (which might not necessarily be the Mojang account email) when you use the Windows 10 Store app to re-download your Windows 10 Minecraft again.

I own minecraft "windows 10 edition" on xbox one but isn't availabile on windows 10....

There is no "Windows 10 Edition" on the Xbox One.

On the Xbox One, there was a "Minecraft Xbox One Edition" but that has been replaced with just "Minecraft".

As the others already said, "Minecraft" is not a Play Anywhere title, so owning "Minecraft" on the Xbox One, doesn't give you "Minecraft Windows 10 Edition" on the PC.

However, if you own Minecraft Java Edition on PC, you can log into your Mojang Account on PC, and can get a code for the Windows 10 Version.