[NVIDIA/Wayland] Custom resolution 2560x1080 no longer available after fresh install — minimum available is native 3440x1440

[umibozu83]

Describe the bug
After a fresh install of the latest Bluefin (NVIDIA image), the display resolution selector only offers the native resolution 3440x1440. A previous Bluefin install (also NVIDIA) correctly exposed 2560x1080 as an available option.
At 3440x1440, video playback stutters significantly — even simple 1080p content. Dropping to 2560x1080 previously resolved this entirely.
System info

Image: Bluefin (NVIDIA) — latest tag
GPU: NVIDIA RTX 2080 8GB
Monitor: Ultrawide 3440×1440 (native)
Session type: Wayland
DE: GNOME

To reproduce

Fresh install of latest Bluefin NVIDIA image
Open Settings → Displays
Only 3440x1440 is available — no lower resolution options

Expected behavior
Lower resolutions (specifically 2560x1080) should be available in the display settings, as they were on a previous Bluefin NVIDIA install.

I followed several guides found online, but none of them worked.

Sorry, I'm new to Linux, especially atomic/immutable distributions.

Ps: 'm currently on a different PC, but if needed I can provide the output of rpm-ostree status and nvidia-smi.