Good Day Janice,
My name is Carlo, I am also using Windows 10 pc and community member like you. Let us work together to sort this out.
Here's the steps you can try.
-Press Windows key + X
-Go to Settings
-Click Update and Security
-Click Troubleshooter then Additional troubleshooter.
-Look for Speech and run the troubleshooter.
Connect the Headset and proceed with these steps.
-Go to Control Panel
-In Control Panel, select Large icons from the View by drop down menu.
-Select Sound.
-Select the Recording tab
-Right click the Microphone and click Enable.
-Right-click it again and select Set as Default Device.
-Right click Microphone and click Properties.
-Click the Levels tab, then drag the volume slider towards the largest value.
-Click OK
-Click Advance Tab
-Uncheck the box to "Allow application to take exclusive control on this device"
Turn on Microphone Privacy in each app.
Select Start > Settings > Privacy > Microphone . In Allow access to the microphone on this device, select Change and make sure Microphone access for this device is turned on.
Then, allow apps access to your microphone.
Once you've allowed microphone access to your apps, you can change the settings for each app.
Restart once done and check.
If issue persists, try to uninstall the Canva and re-install it back and check the mic.
Have a wonderful day ahead and stay safe.
Sincerely,
Carlo T.