They're fine throwing weapons at Ukraine but using effective use of their own military personnel, they seem extremely hesitant
Ukraine never asked for any personnel, just for weapons. That come extremely slow and few, for the American fear of "escalation" (despite nothing happening when they do expand aid eventually), which includes for example not only still refusing giving any fighters but even blocking the Polish transfer of Polish fighters (for full year, until this March). So again, no one even wants any American personnel (beyond Polish and Baltic or Slovak or Romanian borders).
Ukraine never asked for any personnel, just for weapons. That come extremely slow and few, for the American fear of "escalation" (despite nothing happening when they do expand aid eventually), which includes for example not only still refusing giving any fighters but even blocking the Polish transfer of Polish fighters (for full year, until this March). So again, no one even wants any American personnel (beyond Polish and Baltic or Slovak or Romanian borders).
As for American volunteers, https://archive.is/C4o4e