Where to set resolution and bitrate for screen sharing

we present our sessions on a TV, but because our devs use 2560x1440 as desktop resolution and we present it on 3840x2160 TVs everything is very hard to read because jitsi does downscale it to 720p. How can i increase the resolution and bitrate for the screenshare feature? i only found it for the webcam.
Thank for help

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nobody a idea?

I too am looking for this info. Any idea what the current specs of the screen share are? Is it only 720p?