I have the exact same issue!!! I can connect to my NAS (SMBv1) using Skybox 2.2. But in SkyBox 2.3 (Oculus Quest), it won't show any folders!!!
There is no way to change my NAS to support SMBv2 or SMBv3, please add back the support on SMBv1!!! Most of the home-use NAS are still running SMBv1!!!
Please. Give a hand to all Oculus Quest users....