Hello, I'm independent advisor A&K. I'm glad to be able to help you.
I am a Minecraft player, too. According to my understanding, I am sorry that Minecraft on mobile phones and on computers need to be purchased separately. Although their content is the same, the purchase on the mobile phone is through the Google Store, which is a third-party store and has nothing to do with Microsoft.
At the same time, in fact, the bedrock edition on mobile phones is not the same as the bedrock edition of Windows 10. Mobile phones and computers have two different hardware architectures.
I will keep to follow up until the problem is solved. My English is not good. If you don't understand my words, please let me know.