If your computer supports Bluetooth 5.0, you can easily connect multiple wireless speakers. As it is one of the features of Bluetooth 5.0 or later. While modern-day computers might come with Bluetooth ...
Microsoft is testing a Shared Audio feature in Windows 11 that streams audio to two Bluetooth devices simultaneously.
I am assuming here that both the devices are paired. You can confirm that by going to Settings > Devices > Bluetooth. You can then follow the tips mentioned below if the Bluetooth speaker is connected ...