Sounds good and there was No  frame rate drop while playing just  recording comes out at lower fps in 4K  since I was playing and recording using OBS  on the same RTX 4090 .

 Once you turn on all of the Video Display options from Unreal 5 (DLSS Super Resoltuion, Nvidia Frame Generation, Nividia Low Latency, etc.) and make them available in the Option menu as well as Resolution settings there won't be any problems with playing and recording from the same GPU because the player can just optimize it there in the menu (I just went through that with "Mindseye" and was able to play and record that in 4K with  the same setup)

All the best and looking forward to more.  You should setup some Social Media outlets like  Youtube and Twitter / X .com account for your Studio for players to follow.  

Also once you get more gameplay completed I would recommend you posting on r/gaming , r/rpg_gamer , r/pcgaming,  r/tbs ,  r/cyberpunk Sub-reddits and since you are the Developer you can post links to Development Videos to show your progress.  Reddit is THE Discovery Platform for New Games... There is nothing better and as since you are the Develper and don't post like every day or every week but give meaningful updates to those Subreddits you will have a LOT of Eyeballs on your Game and can really grow it.