Can I upgrade my old MacBook Pro to the latest macOS?

No.

The 2012 MBP cannot run any macOS newer than 10.15.7 Catalina.

There is no workaround.

If you need a newer OS version, you'll need to buy a new(er) Mac.

ippy1 Said:

"MacBook Pro 15″ Date of Purchase: November 28, 2012: Is it possible to update my old MacBook pro, to allow it to upgrade to the latest OS?"

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No. The farthest-back compatibility goes is 2018. See here: macOS Sequoia is Compatible with these Computers - Apple Support