Note that Ubuntu Pro is for LTS versions of Ubuntu only and does not provide any benefits for non-LTS releases.
This is evidenced by attaching your system to Ubuntu Pro as detailed below in the section about it, and then running sudo pro status --all to get output like this about what is available for you under that subscription. We can compare LTS vs. non-LTS status entitlements and what's available for each here:
Ubuntu 22.04 LTS System
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.1 LTS
Release: 22.04
Codename: jammy
$ sudo pro status --all
SERVICE ENTITLED STATUS DESCRIPTION
cc-eal yes n/a Common Criteria EAL2 Provisioning Packages
esm-apps yes enabled Expanded Security Maintenance for Applications
esm-infra yes enabled Expanded Security Maintenance for Infrastructure
fips yes n/a NIST-certified core packages
fips-updates yes n/a NIST-certified core packages with priority security updates
livepatch yes enabled Canonical Livepatch service
realtime-kernel yes disabled Ubuntu kernel with PREEMPT_RT patches integrated
ros yes n/a Security Updates for the Robot Operating System
ros-updates yes n/a All Updates for the Robot Operating System
usg yes n/a Security compliance and audit tools
Enable services with: pro enable <service>
Account: <snip>
Subscription: Ubuntu Pro - free personal subscription
Ubuntu 22.10 non-LTS System
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.10
Release: 22.10
Codename: kinetic
$ sudo pro status --all
SERVICE ENTITLED STATUS DESCRIPTION
cc-eal yes n/a Common Criteria EAL2 Provisioning Packages
cis yes n/a Security compliance and audit tools
esm-apps yes n/a Expanded Security Maintenance for Applications
esm-infra yes n/a Expanded Security Maintenance for Infrastructure
fips yes n/a NIST-certified core packages
fips-updates yes n/a NIST-certified core packages with priority security updates
livepatch yes n/a Canonical Livepatch service
realtime-kernel yes n/a Ubuntu kernel with PREEMPT_RT patches integrated
ros yes n/a Security Updates for the Robot Operating System
ros-updates yes n/a All Updates for the Robot Operating System
Enable services with: pro enable <service>
Account: <snip>
Subscription: Ubuntu Pro - free personal subscription
As you can see, only the LTS releases are entitled to anything in Ubuntu Pro, so your 22.10 system gains no benefit from a Pro subscription.
To attach your system to a Pro subscription, though...
Despite the limitation of Pro only being for LTS, go to your Pro dashboard at https://ubuntu.com/pro/dashboard and you will have your subscriptions listed. You click your subscription and the info on the right side changes to it. Where you see Token and Documentation, it shows you the command to run to attach your system to Ubuntu Pro - which is sudo pro attach TOKEN_HERE.
This is a screenshot example from my Pro dashboard (I use Pro "free" for my expired / old LTS boxes that need ESM but also Livepatch, note that I'm an Ubuntu Member so behind the scenes that "5 Free" is actually more machines than 5, but only 5 are reflected here).
Note that Pro plans are not all equal! You get zero support for the 'cheap' Pro entitlement plans on Desktop installs unless you want full Canonical tech support in which case it only will work for LTS releases and is $300 per system. See https://ubuntu.com/pricing/pro for details on what comes with each subscription type/tier.
