Yes and no. Yabluko was originally designed for Ukrainian, but 90% of the grammar (cases, aspects, motion verbs) is identical to Russian. The vocabulary differs slightly. Russian learners often use it as a "cognate bridge."
Yabluko Intermediate (B1/B2) textbook is widely considered the gold standard for serious Ukrainian learners, often described as the "Genki" of Ukrainian language learning. It is a substantial, 304-page course designed for roughly Core Review: Why It’s "Solid" Logical Progression yabluko intermediate level pdf exclusive
To help me tailor more specific Ukrainian language resources for you, could you tell me: Are you or working with a tutor ? Yes and no