Lauan is also known as meranti plywood, it can be inconsistent to cut and chars a fair amount. 0.196 sounds a bit thick, most Lauan I see is more like 0.110, you might want to check that. You probably got the 5mm stuff and are correct, but still, worth a doublecheck.
As for where to start with my test shape, I have one that I use for 1/8" wood that is 150/160/170…240, full power, 1x. I let the height float (leave it on auto or blank). With a pro, 150/full is enough to get through almost any 1/8" wood except ridiculously tough exotics like ironwoods, rosewoods, etc. If you have a basic I might start at 130 and go up by 15 speed with each step, so 130-280.
THAT BEING SAID: my meranti cuts really easily, but again, I may have the 3mm stuff instead of the 5mm stuff.
Then use the set focus feature to set the height or manually measure (with your calipers probably) and enter the thickness. Since you never set specific heights in your test cut job, it’ll work with whatever material you throw at it.
Then let er rip. 150/full at the correct height should easily get through lauan, but it’ll probably be heavily charred. That’s why I don’t prefer lauan, it chars. Baltic has less character and doesn’t engrave as darkly, but it’s more consistent and doesn’t char.
In the future, you can search for lauan or meranti settings, like so:
https://community.glowforge.com/search?q=meranti
https://community.glowforge.com/search?q=lauan
Lots of discussions about this very topic.