A bit misleading to say most states or a few states have legalized it.
Sure other states are researching it, but that's a long way from state sanctioned legalization.
I wish everyone in the states had access to it, sadly that's just not the current reality here today. States could benefit economically like most have from legalization of marijuana, billions of dollars to be made.
In addition to Oregon, no states have, but some cities have.
“The movement to decriminalize psilocybin in the United States began in the late 2010s, with Denver, Colorado, becoming the first city to decriminalize psilocybin in May 2019. The cities of Oakland and Santa Cruz, California, followed suit and decriminalized psilocybin in June 2019 and January 2020, respectively.”
https://en.m.wikipedia.org/wiki/Psilocybin_decriminalization...
In addition to Oregon, no states have, but some cities have.
“ The movement to decriminalize psilocybin in the United States began in the late 2010s, with Denver, Colorado, becoming the first city to decriminalize psilocybin in May 2019. The cities of Oakland and Santa Cruz, California, followed suit and decriminalized psilocybin in June 2019 and January 2020, respectively.”