I'm not really qualified for a full answer, but...
The stuff does look genuine, but it's not sufficient to make conclusions about the actual plans (without knowing more).
The table from the workbook shows daily changes in frequencies and callsigns for several units (of the Black Sea fleet). Such things are routinely prepared in advance. Of course, they are secret (marked on the cover). But I suspect the table extends forward and even backward on other pages (or in separate similar documents).
To determine whether it indicates a war plan, we'd need to know whether such daily changes are normal in peace time. I don't. And even if they are not, war plans are, of course, get prepared for many situations by all armies. We'd need a document (an order) that activates these plans.
I can't analyse the map in detail, but again, apart from looking real, it doesn't say much even if it shows a real war plan.
Besides, this is specifically a naval plan. It can't cover the whole land operation. Presumably, a full-scale war plan on Ukraine would involve naval blockade, but this stage would not need to cover the full length of the war (once the shoreline is captured).