HA Upgrade from 26.1.11_10 to 26.7.1 steps

[relvy]

Hello,

I want to upgrade my HA cluster from 26.1.11_10 to 26.7.1.

From the docs the basic steps are clear and I run the upgrades within 26.1.x this way.

Update your secondary unit and wait until it is online again
On your primary unit go to Interfaces ‣ Virtual IPs ‣ Status and click Enter Persistent CARP Maintenance Mode
You secondary unit is now MASTER, check if all services like DHCP, VPN, NAT are working correctly
If you ensured the update was fine, update your primary unit and hit Leave Persistent CARP Maintenance Mode

But from reading the 26.7.1 release notes there are some special things not covered there:
- Migration of Outbound NAT -> Source NAT
- CPU Microcode
- PFSync compatibility due kernel upgrade

I successfully migrated from outbound NAT to Source NAT on both primary and secondary, so I expect no issue during upgrade.
IIUC my next step is to deinstall the microcode plugin on both machines and install it after the upgrade again due to bootloader changes ?
All other steps should be as the documentation says.

For a short window I will have my primary on FreeBSD 14.3 and my secondary on FreeBSD 15.1, where I must do the failover.
Is PFSync compatible or is there something I need to pay attention to ?