Both; for is a person & of would be for something besides.
I would say that "support to" is used to mean a literal support such as to hold up a roof. He added a steel brace to give more support to the roof. I would say "support for" to indicate approval for...
that u may not feal what she or he going true but u will always be there for them
sostegno.
D'appui au sol.
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