Active partitions are not needed for EFI-based Windows boots

If you look around Disk Management or DiskPart on an older Window system, you'll probably find mentions of a partition being "active." An active partition is needed to boot the machine using the old boot method. It is not necessary, however, using EFI boot. In Windows, a GPT disk almost always goes along with EFI boot. The EFI System Partition contains the critical boot information. Therefore, it's unnecessary - and, in fact, not possible - to set an active partition on a GPT drive with Windows disk management tools.

You can check whether your current boot configuration is EFI with the bcdedit /enum command. If the output's Windows Boot Manager section references .efi files or an EFI folder, the boot is EFI-based.

Based on my Super User answer.