If this doesn't work, we are thinking about using some form of AI/automation tool that log you into all of your platforms, and automate the posting process - you would go to the tool, write your content there, select the platforms you want to post your content, and press run/post. The tool opens up and signs you into your platform, go through the posting mechanism, take a screenshot and save the post, and sign you out of your platform.
The tool will enable ad-blocking.
Next is to create a way to interact with comments from multiple platforms...
Does Edge run on Linux?
https://blogs.windows.com/msedgedev/2020/10/20/microsoft-edge-dev-linux/
https://itsfoss.com/microsoft-edge-linux/
https://liliputing.com/2020/09/microsoft-edge-coming-to-linux-and-linux-gui-apps-are-coming-to-windows.html