I'm guessing the critters will find their way around an electric fence especially if you have some diggers.

4 of these on a perimeter pointed into the garden might work. Since it is hard to keep them out you can try to make them feel uncomfortable when they get inside. Reviews seem to be good. Less work too. Solar powered and motion activated.

https://www.amazon.com/Ultrasonic-Repellent-Operated-Waterproof-Repeller/dp/B06XTLFTDG/ref=pd_lpo_vtph_86_bs_tr_t_1?_encoding=UTF8&psc=1&refRID=W48AB7370CKM59C87186