Is this to do with deployment further from home?
No, slightly different requirements resulting in a different ship profile.
The currently afaik fixed-down requirements (since April '25) are for a 130m-long, 10,000-ton displacement "compact variant" with three main tasks:
- supply and support of boat squadrons (corvettes, minehunters, submarines), mostly for fuel and ammunition - primary task
- limited transport of troops (special forces platoon) and vehicles (maybe 300 lane meters) in a reconfigurable flex deck
- possibility of deploying UUV, USV, UAV from flex deck via helicopter deck, stern boat ramp etc.
The vehicle transport capability is neither amphibious nor large-scale, but intended for e.g. deploying a harbor security company with its vehicles. Think very similar to the flex deck on Danish Absalons. Alternative uses for the flex deck are e.g. patient transport / medevac, or carrying a relatively large number of containers internally - also for containerized workshop sets (for SUG system support groups like on Elbe).
The supply capacity is sized around supporting corvette squadrons, and basically around four to five times the capacity of the current Elbe class. The current Elbe class ships are simply too small for that task, they'll fill up a single empty K130 and would then have to refuel themselves. They're also planned to be a bit faster for optionally acting as an escorting supply ship for solo frigate deployments. And they'll get proper RAS gear.
Like the Elbe class they're planned to serve as command ships with staff rooms for a CTG, In comparison to the Elbe class the new tenders will be better armed, although that doesn't make for a difference in size. Pair of RAM launchers plus 30mm guns. Helo deck for a heavy helicopter with onboard resupply facilities, no hangar (same on Elbe).
During planning they also evaluated a more compact version (without flexdeck or troops, just container space - pretty much a direct Elbe replacement with larger supply capacity) and a less compact version (mostly larger flight deck and hangar facilities, possibly something welldeck-like for also supporting larger UUVs). The big variant would have been around 160m and 13500 tons, i.e. LPD-sized.