@Satish Kumar - I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others ", I'll repost your solution in case you'd like to accept the answer.
Ask: Table Access control option is not available in Azure Databricks Compute cluster
Solution: Issue is now resolved, unity catalog option is not available because the workspace was created 04 years back and recently, we upgraded this workspace from standard to premium. The feature is available in newly created workspaces with premium pricing tier. For old workspace Databricks Admin can create new workspace and add the old workspace to new one. After this you can see the Unity catalog feature under advance option of all purpose cluster.
If I missed anything please let me know and I'd be happy to add it to my answer, or feel free to comment below with any additional information.
If you have any other questions, please let me know. Thank you again for your time and patience throughout this issue.
Please don’t forget to Accept Answer
and Yes
for "was this answer helpful" wherever the information provided helps you, this can be beneficial to other community members.