5120 x 1440 supported with Resolve 17? 32:9 ratio

I have recorded some videos while playing on my 49" monitor. Ratio is 32:9 with 5120x1440 res. After finish editing i want to save it (deliver > render). Issue is that i cant find the 5120 x 1440 resolution on drop down list. I am selecting "Custom" on render settings. Additionally i am not allowed to choose manually this resolution. Is reason because i use the free version? Additionally i would expect that i can save it at least with e.g. 3600 x 1080 resolution but when iam doing this, the saved video doesnt fit on my screen (full screen).

That Means that i cant keep the 32:9 by saving on less resolution?

Thanks

My specs are the following


Samsung CRG49 5120 x 1440
Davinci resolve 17
Windows 10
Ryzen 7 3700
rtx 3070

[Peter Chamberlain]

You need to get the Studio version for greater than UHD timeline or render res.