Going back to the original question: Should a stimulus bill be helping other countries: Off course not, unless it is directly stimulating the original country.
Eg. you could see where keeping low oil prices by stimulating the economy of a good ally such as Israel or UAE would be helpful, since low cost oil is necessary to keep the economy going, especially since Biden is going to cut off domestic supplies.
I however don't see where helping terrorists like Iran (aka Palestine), or African countries that shift Islamic leadership every few years in bloody conflict, or China/Russia/EU that have its own communist agendas is any helpful.
On the topic of stimulus, quite honestly I don't think stimulus is helpful at all. Bush did a major stimulus bill, Obama then came along and raised taxes and healthcare costs to pay for it all. Under Obama we payed more taxes EVERY YEAR than any of us received in the stimulus and our deficit still grew out of control due to regulatory overhead. Trump somewhat balanced it out again with major regulatory reform which stimulated the economy to levels we hadn't seen since the 1950's, but he never really got around to fixing the deficit problem, which compared to GDP (pre-COVID) didn't really grow but also didn't get reduced.
You want real stimulus: cut taxes and regulations. Why do we give people $600 when 4 months from now we have to pay much more than that in income taxes? Simply cut income taxes by $600-2000/year.