Bundle demand is outcome shaped. People search for the result they want rather than the item that produces it, which is why a well written kit page can rank for queries none of its components would ever win. To do that it has to be a permanent product page rather than a seasonal collection: its own URL, its own copy explaining who the kit suits and why these items go together, an itemized contents list with quantities and sizes, and links to each component page.
Around it sits a layer of occasion and recipient collections. Gift sets by price band, kits by activity or skill level, and sets by recipient are all natural collection pages with genuine demand behind them, and they need to be generated from rules so they stay accurate as bundles change. Linking components back to the kits they appear in matters as much as the other direction, because a shopper who found one item may prefer to buy the set.
The common technical mistake is building bundle descriptions by concatenating the component descriptions. That produces a page duplicating every product it contains, which competes with them and ranks for nothing. The other issue is availability: when a kit goes out of stock because one component ran out, the page should stay in place with a clear status rather than disappearing and losing whatever position it had earned.