The name of the twitter account is "نبض الفرات" which translates to "Euphrates pulse". However, you're right that the Twitter bio doesn't have that phrase; rather, in the link you gave it's another CENTCOM disclaimer. It looks like this phrase in the bio was later deleted and replaced with nothing (https://web.archive.org/web/20210506142008/https://twitter.c...), and probably not coincidentally the account is now suspended for breaking the Twitter rules.