DD's level is currently at a 5:1 ratio (15 girls, 3 coaches). After warmups, they'll split into 3 groups - 1 with each coach. Beam is somewhat simple - there are 10 beams, 5 girls, so everyone gets a beam. The coach is walking around telling them what to work on and is spotting/correcting girls as she walks around. She's giving verbal feedback to the girls she's not directly near at the moment. Bars usually uses a rotation between the low strap bar, the high strap bar, the high bar and the uneven bars. The coach is almost always at the uneven bars spotting and working on form/technique. He's also calling out corrections/instructions to the girls at the other stations. On floor, they're either working drills that require a specific configuration of mats (or TumblTrak), in which case they take turns, or they're doing tumbling on the floor, in which case they're spread out in a line. The coach will correct/spot/work with each of them throughout that rotation. Vault usually involves some drill or actual vaults that are done one at a time.
If you add it up, DD is probably getting 1:1 time a fair bit of practice, but there's rarely a prolonged stretch where a coach is focusing directly on her.