Copilot apps cannot communicate across platforms

I use multiple platforms including Windows, iPad and iPhone.  I assumed that the best approach would be to use the dedicated app for each device but I soon discovered that is a mistake.  Chat's done on one platform are not visible on the other platforms.  I asked Copilot about this and it conceded that was the case and that the recommendation is to use the Web based Copilot rather than the apps.

it is a shame to see a company the size of Microsoft put out apps called the same on multiple platforms but those can't pass data to the other platforms.  This is a huge productivity issue.  It is obvious that there are different teams working on the apps for the different platforms and they are not communicating.  This is a real shame and is a pretty big miss for a billion dollar company.  Makes me question their long term AI strategy and how competitive they will be.