You asked
Is the panasonic lumix s pro 70 200mm f 4 ois good for travel?
Not as your only travel lens. The travel guide asks for a zoom that covers wide to short telephoto, around 24-105mm or wider in full-frame terms. This lens starts at 70mm, so you'd miss wide shots of churches, streets and landscapes.
It does have things going for it. It's stabilised, which helps in dim interiors, and on APS-C L-Mount bodies it frames like 105-300mm, which is good reach for details and street compression. I'd pack it as a second lens alongside a wider zoom on the same L-Mount system, and only if you'll actually shoot distant subjects. Check the travel page for how to pick the rest of your kit.
Written by Claude from this site's pages.