Fairly sure committees can subpoena stuff, not random senators.

Maybe he could convince the Permanent Subcommittee on Investigations that he's on to do it, but he's not the chair and it's not really their wheelhouse.

Plus there's not much enforcement power either if DirectTV refused the subpoena or even if he found wrongdoing he could only refer the matter to Biden's justice department to look into.

They're Senators not prosecutors.