does your current charger brick and cable not charging over any other device as well? have you try any other charger or cable?
try to take a look at your charging port, probably need to clean up from dust or any sort of?
I have the same issue! Phone is not getting charged in FOLD mode. Additionally the device is charging very slow now in the flex mode. It is displaying a message saying - Device is charging slowly due to cold Temparature. Its been a week now.
Need support here.