How to add customized platform MIK32Amur to Platformio?

I have all documentation and all files to make my board available to work with. However, it cannot see my board, platform and library. What should I do?

Can you publish the current state of your platform?

PlatformIO Core, version 6.1.16

No, that’s what I meant. I meant the current code of your customized platform. Upload it to e.g. Github. It’s hard to tell what the error is, otherwise.

To say short, I solved my problem: I only needed to put all my files into .platformio directory) Thank you for responding! But I cannot use Arduino framework. How can I solve that problem?

Literally can’t say anything without seeing the custom platform. There are many parts to that puzzle.