After testing, use the ble image-confirm to complete the update and finalize image swap.
Run the ble image-confirm subcommand with the correct option values and the hash of the image you want to confirm to make the image permanent:
nrfutil mcu-manager ble --hci-serial-port COM35 image-confirm --device-name Nordic_LBS --hash 74e62f0ce9c2045f8f56f650e2667c531be55b1289dc8109ba6445409a8a072f
The output will look similar to the one shown above, but the new application image in slot 1 will be marked as currently active (active: true) and confirmed (confirmed: true):
v Device found: F9:9F:F3:7E:B3:D6, Nordic_LBS
v Connected to device: F9:9F:F3:7E:B3:D6
Image
slot: 0
version: 1.0.0
hash: a111cd40c001b75439dfd0d4ecaa1c9b2de71b80fd49a8f0f6a3c151055e45b5
bootable: true
pending: false
confirmed: false
active: false
permanent: false
Image
slot: 1
version: 2.0.0
hash: 74e62f0ce9c2045f8f56f650e2667c531be55b1289dc8109ba6445409a8a072f
bootable: true
pending: false
confirmed: true
active: true
permanent: false