The Dutch pronunciation for Tygo is usually TEE-go, although it can also be pronounced as TEE-kho (usually that is done in the north of the country, as there they usually pronounce a 'g' as 'kh').
You can listen to audio clips of the name here:https://nl.forvo.com/search/Tygo/nl/ (in Dutch)The first clip (about Tygo Gernandt) was done by a man from the northwest of the Netherlands, while the second clip (about Tygo Land) was done by a man from Flanders in Belgium. If you listen closely, you can hear that they pronounce the 'g' somewhat differently: the Dutchman's sounds a bit like a hard g (but not completely), while that of the Fleming is most definitely a soft g.Here is another example, this time from a completely different source: an episode of the Dutch talk show "De Wereld Draait Door" (2005-2020):https://youtu.be/hQozuR6DJVQ (in Dutch; the name is said at 0:01 and 0:04 and 0:59)All in all, I would say that the IPA-pronunciation of the name is usually: /'ti.ɣo:/