This is not really a full picture of Swine flu and the differences in that pandemic vs the current one.
The first difference is that by May 2009 the CDC had already issued recommendations of influenza antivirals to help with Swine flu. The second difference is that by Oct 2009 the first doses of Swine flu vaccine were already being administered and would be used in future flu vaccines since it was a type of flu, not a SARS type illness like COVID. Also, the Swine flu peaked in the US in May-June 2009 and was considered over as a pandemic in Aug 2010 by the WHO.
A timeline of major events that took place during the 2009 H1N1 flu pandemic.
www.cdc.gov
The CDC also did, just like they do for the flu and other diseases, calculate the outcomes. The final estimates for the US are
Infections - 60.8M
Hospitalizations - 274,304
Deaths - 12,469 (roughly 2/3 in the 18-64 age range)
www.cdc.gov
In the end it was a known pathogen - just a new version of the H1N1 flu - that had a very low mortality rate. (about 0.02%) and that they were very quickly able to create antivirals and vaccines for. There were some limited local closures in 2009, but nothing like what we have seen this year.
To calculate the burden of 2009 pandemic influenza A (pH1N1) in the United States, we extrapolated from the Centers for Disease Control and Prevention's Emerging Infections Program laboratory-confirmed hospitalizations across the entire United States, and then corrected for underreporting. From...
pubmed.ncbi.nlm.nih.gov
Compare those numbers to the current known US COVID numbers
Infections - 5.4M
Hospitalizations 348,961 as of Aug 17
Deaths - 171,120 as of Aug 18
On a Worldwide scale it is estimated to have killed up to 284,000 people worldwide, mostly in SE Asia and Africa.
Swine flu ended up being a highly infectious, but very low mortality rate disease (0.03% vs 0.3-.06% IFR for COVID). With an extremely low IFR and a vaccine available by fall there was no need to engage in the types of measures that we are engaging in worldwide for COVID. They didn't need to bat an eye because it wasn't going to be ongoing and it wasn't going to kill very many people. Hospitals weren't being overrun and they had medicines and vaccines to fight it. Other than being called a pandemic there are not alot of similarities to the Swine Flu and COVID in the US.