How to deploy only selected objects from a custom model to UAT in D365 F&O?

I have created a project in Visual Studio under my custom model. In that project, I have created a few custom security roles. To add restrictions to those roles, I duplicated existing privileges and duties, made modifications to them, and assigned those privileges to the roles. I have also written some custom X++ code to extend form classes.

Now, I want to deploy only the objects that are part of my current project first to UAT, and then to PROD.

Which method should I use to do this?

Can I deploy using Azure DevOps CI/CD pipelines, or should I build deployable packages and deploy through LCS?

Which approach is better?

What is the difference between these two methods?

Before deploying, what all pre-checks should I do?

For example, should the Dev and PROD versions be the same?

What tools are required for deployment?

How can I check whether I have the required access/permissions to perform the deployment or not?

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