Needing advice on next steps please!

Sooo my roughly 5 year old flf that’s lived a tough life finally dropped its last leaf recently. Now I have a two foot twig. I’ve checked the soil and roots, neither looked concerning.

There are some tiny growth points visible on the top half, but very slow moving if at all. What do you suggest I do? Can it be saved?

Yes… As seen I’ve tried both chopping the top and notching, clearly unsuccessfully.