Unfortunately, Instagram does not currently allow users to send direct messages (DMs) from the desktop version of their website. However, there are a few workarounds you can try:
Use the Windows 10 Instagram app: If you're using a Windows 10 computer, you can download the Instagram app from the Microsoft Store. The app allows you to send and receive DMs just like you can on your mobile device.
Use a third-party app: There are several third-party apps that allow you to access Instagram DMs from your desktop computer. Some popular options include IG:dm, Rambox, and Flume. However, be cautious when using third-party apps as they may not be secure and could potentially compromise your account.
Use an Android emulator: If you have a Mac or PC, you can download an Android emulator like Bluestacks, which allows you to run Android apps on your desktop. Once you've downloaded Bluestacks, you can download the Instagram app and send DMs just like you would on your mobile device.
Keep in mind that while these workarounds may allow you to send DMs from your desktop computer, they may not be as user-friendly as the mobile app and may not have all the features of the mobile app.