What method do u think is best to see how it'll look before it runs? If it shows as a normal looking domain in the ad preview is that how it will show unless the searchers browser shows punycodeYes, Google allows domains with accents (IDN domains), but it shows in punycode format in ads sometimes, like xn--exmplewebsite-abc.com. Some browsers may show the accent, some show punycode. Better to check how it looks before running ads, cause users might see weird characters.
create a draft campaign and check it in the Ads preview & diagnostic tool, that should workWhat method do u think is best to see how it'll look before it runs? If it shows as a normal looking domain in the ad preview is that how it will show unless the searchers browser shows punycode