I have followed and double checked the trellis docs for multi-site install (development), and even installed the multi-site url fixer (even though I’m planning subdirectory structure) on the vm. There were no errors in bringing up the vm (via vagrant up) but I only see a single wp installation… no multi-site tools appear in the admin panel.
Ah, there it is… thank you. As I was copying it the file to paste it here, I realized that I placed the multisite section too far down in the file… did not see it at first, but the multisite config lines must come before the line $env_config = __DIR__ . '/environments/' . WP_ENV . '.php';