Solution
To install NI-IMAQdx Support for other LabVIEW version you need to do below steps.
1. After finished installing the NI-IMAQdx 20.5 version, open
NI Package Manager (NIPM).
2. Click on the
Packages tab and search for NI-IMAQdx Support for your LabVIEW version.
3. Select the NI-IMAQdx Support for your LabVIEW version, then click
Install.

4. Next, proceed as per instruction.