Hi @Mumtaz Sharif (US),
Thank you for posting in this community.
We can use PowerApps to create cascading columns in SharePoint Lists.
You can refer this article to create it: Working with Cascading Lists in SharePoint and Power Apps.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.