11 Week Bernedoodle Separation Anxiety

Hello! I need some advice. I recently got a super sweet bernedoodle, and she has been doing great in almost all aspects of training (potty, leash, crate, etc) but my bf works from home and has been doing so at my place because she cannot be left alone. Anytime she can’t see one of us, especially while crated she loses her mind. I don’t wfh and am hoping to be able to leave her home while I work and come home for my hour lunch, but anytime I try training / practicing with her she barks so loud you can hear it from outside my apt complex. I’ve tried the following training: – walk away for short bursts and coming back – rewarding her in the crate when she is quiet – keeping her occupied with a frozen kong or chewy

So I need advice, should I continue the training and hope it eventually works, hope that her barking will settle after a bit, or something else?

Thank you all!!