you should choose the bazzite-nvidia or bazzite-deck-nvidia image (depends whether you want Game Mode or not), since the nvidia image comes pre-installed with the nvidia driver for your dGPU
okay i installed bazzite with steam os. it finished, steam login in steam os succesfully and now i have one problem. my eyes hurting with 2fps diashow in steam os... how can i fix it? its stable and i finished all updates. but i use bazzite desktop with kde plasma and i have smoothing 144fps. do you have an idea how to fix steam os?