Hi, we have the option from the world settings but I recommend to test in brand new created no Mods world where you disable all NPCs except Spiders to do a better testing and to see how it goes in the new game version as to know if Bugged and need to be reported.

Option from "Encounters and NPCs" in world settings :
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3608181216

That said, don't forget to report on the Official SE1 Support Portal if not working, this way they can have a look at and tell you if they will have to fix or not.

The only Bug I found so far in the new game version we have today is Spiders not spawning in older saves that were saved before the Core update, I have reported on the Portal, they told me what to do and all good now :

BUG 01_208_014 - Spiders don't spawn on Titan and Alien planet
https://support.keenswh.com/spaceengineers/pc/topic/50197-bug-01_208_014-spiders-dont-spawn-on-titan-and-alien-planet

YYeah, I’ve been standing on the ground for 25 minutes and there isn’t a single spider in sight.
I guess they will spawn after about 30 minutes.
I read that they randomized the spawn timer from 5 minutes to 30 minutes.

Personally, I think this is way too low, and there’s no easy in-game slider to adjust it…

Now I have to figure out how to edit specific planet values because there’s no vanilla option.

But thank you for your time.