Currently, Makecode cannot do the following, but do you have any plans to add functions in the near future?
In the Makecode tool, if multiple micro:bits are connected to the computer at the same time, for example, 6, display the list and select a specific one from there. And when you save the code programmed with Makecode editor, it will be automatically written to the selected micro:bit.
Hi @HidetoYasuda — Welcome to the forum!
One way to request new features on open source projects, like MakeCode, is by creating an “Issue” that describes the feature on the GitHub repository with the code for the project. You can create a MakeCode / micro:bit issue at: https://github.com/microsoft/pxt-microbit/issues. (If you don’t have a GitHub account, you may need to create one or ask someone else with a GitHub account to create the issue on your behalf)