This is simply not true.
There was plenty of plate stepping by the USA and Pres. Trump in a big way for every disaster you listed.
The US is the largest donor of humanitarian aid world wide. This statistic shows the top donors of humanitarian aid worldwide in 2019. In this year, the United States government donated nearly 6.5 billion U.S. dollars in humanitarian aid worldwide. (We’re the long blue line.)
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Hawaii Relief
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Australia bushfire relief
The USA also sent 100’s of actual living, breathing, firefighters to help Australia during the wildfires. They sent in shifts of 100-400 specialized firefighters at a time, and then fresh men were sent in. This went on for months.
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Phillipines relief
The US helped the Phillipines monetarily, provided prompt humanitarian efforts and immediate emergency relief supplies for 7,600 displaced people.
The United States Geological Survey's Voclano Disaster Assistance Program (USGS VDAP) also provided equipment and remote technical assistance to the Philippine Institute of Volcanology and Seismology to monitor the Taal Volacano eruption.
The US distributed supplies to evacuees in another town.
https://www.nifc.gov/fireInfo/fireInfo_Australia.htm
USAID Provides Humanitarian Assistance for the Eruption of Taal Volcano in the Republic of The Philippines | Press Release | U.S. Agency for International Development
Largest donors of humanitarian aid worldwide 2019 | Statista