U4U is clearly exempt.
See https://www.uscis.gov/green-card/green-card-processes-and-procedures/public-charge/public-charge-resources.
The footnote at the very bottom says "USCIS does not consider any public benefits that were received by noncitizens who, while not refugees, are eligible for resettlement assistance, entitlement programs, and other benefits available to refugees. For example, Congress explicitly extended benefits normally reserved for refugees to our Afghan allies and to certain Ukrainians impacted by the Russian invasion of Ukraine."