You can use these 2 sites:
https://kstoerz.com/freespoke/
This one gives the stretch amount. click on "log" to read the stretch.
https://www.wheelpro.co.uk/spokecalc/
I don't know your hub dimensions, but using a few examples from the freespoke database, it comes out 275.1-275.6mm and 273.5-274.0mm, with 32 spokes and 3 cross.
You are sure that the ERD is 565mm? DId you measure it yourself? Is it the 584mm or 622mm rim?
https://www.wtb.com/products/frequency-team
You're sure you have the right lacing pattern?
Are you threading the spokes all the way into the nipple each time you insert a new one or are you only threading it a few turns so that the threads are still exposed? While lacing, you should only turn the nipple a few times, because if you thread them all the way in, it will be very difficult to get the last few spokes to reach the nipples. After all the spokes are laced, then you can start tightening the nipples.