I have the same issue, WiFi disabled when using the 5.13.0-21 kernel, regressing to the 5.13.0-20 kernel fixes the issue.
Hardware name: Dell Inc. XPS 13 9310/0MRT12 BIOS 3.2.0 09/30/2021 5.13.0-21-generic #21-Ubuntu SMP Tue Oct 19 08:59:28 UTC 2021
I have the same issue, WiFi disabled when using the 5.13.0-21 kernel, regressing to the 5.13.0-20 kernel fixes the issue.
Hardware name: Dell Inc. XPS 13 9310/0MRT12
BIOS 3.2.0 09/30/2021
5.13.0-21-generic #21-Ubuntu SMP Tue Oct 19 08:59:28 UTC 2021