Trying this again.
The SKG discord provided some options for those in the state, outside of the state, and for those in other parts of the world (edited to avoid the wrath of DBZer0's automod):

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If you live in California, or know someone who does:

• Find your State Senator here:
  • https://findyourrep.legislature.ca.gov/
• Then go to their “Contact Me” page and submit your support for AB 1921, the Protect Our Games Act.
  • Please include a short explanation of why you support game preservation.

If you live in another state, or know someone who does:

• Submit your support directly to the Chair of the Senate Privacy Committee here:
  • https://lcmspubcontact.lc.ca.gov/PublicLCMS/ContactPopup.php?district=SD03&inframe=N

Everyone around the world can also help:

• Help exposure to this topic / bill. Repost/share on [social media].

• You can e-mail the Senate Privacy, Digital Technologies, and Consumer Protection:

  • [email protected]
  • And express your interest and support for this bill on an international perspective.