You could invest time to learn about LeSS and stuff.
Or, you could take a few people with all skills needed to get software into production. Have them work with people who can reliably and easily agree on priority, plus explain the purpose and meaning of software.
Have these folks try to get something super valuable into production within a day or two. Or a week. Or whatever time frame feels super fast relative to the unique environment they’re working in.
In that experiment, document everything that held these people back from accomplishing the mission… From abilities, to processes, to people. Work tirelessly with them to experiment and adapt the system of work until these people can deliver. Call them a team, product folks and all.
Now try to do it with two teams. Work tirelessly to adapt and evolve everything about the system of work, including the organization until you can reliably deliver important software with two teams.
Now try three. There you go