If you want to support Ukrainians, DO NOT donate to Red Cross. Can't speak about their work in other countries, but they're useless in Ukraine. The only trustworthy international organisation I can think of is World Central Kitchen.
Donate to World Central Kitchen
And it's even better to donate directly to Ukrainian organisations. Here are a few good legit places:
hospitallers.life - "Hospitallers", Ukrainian paramedics on the frontlines
savelife.in.ua - "Come Back Alive", assistance to the army
prytulafoundation.org - "Prytula Foundation", assistance to the army, humanitarian causes
starenki.com.ua - "Starenki", helping elderly people
everybodycan.com.ua - "Everybody Can", helping disabled children, elders and hospitals
uanimals.org - "UAnimals", saving animals
