You really can’t even upgrade from the point your at. We can get your data pools through an upgrade process to the newer(est) version of TrueNAS Scale but you missed the deadline for APPS upgrading, due to some changes. If you want to do version upgrades, removing your apps and going down to only data may be the only way. I’m not sure if you can even do a fresh install and upload a system configuration at this point. I am hoping others comment on upgrade path options.
You would have to recreate the App new after upgrade with all your info. I did see it in the 25.10.1 app catalog,