Hi, we are a bit slow, deliberately, with updating major packages, so that we can reliably maintain a coherent and functional software stack. We will certainly update our default kernels to astropy 6.x, but have not yet tested this sufficiently.
BTW, what you posted is basically an error. Is there any specific command or function call to astropy v6 that you need but isn't currently working? A short code snipped would help, thanks!