Even the San Francisco GOP has people watching polls and even drop boxes in a limited fashion. Volunteers much needed.
Your local GOP may well have an election integrity arm as we do. If not, volunteer and start one. All hands on deck. The national and state parties have all the info you should need.
Our area is so red, the streets are red. Even black folks around here vote Republican. (not all, but a good bit) That said, I know that there can be cheating on both sides. I saw it when I was a youngun in college. The Young Republicans had an election, and a whole lot of people showed up to vote when they weren’t expected. So the leaders of the YR took the ballot box to another room where they stuffed ballots and signed the sign in sheet for others who weren’t present. lol. Yup. The guy who “won” that election served as president of the organization for a year, graduated, and went to work for a RAT politician the very next year.