[Unanswered]  How do the product waves work

so iv been trying to figure out where to find out what wave of the newer sets of beyblade burst comes out 
so how does the release dates come out
As you can see at https://beyblade.fandom.com/wiki/List_of...kara_Tomy) Takara Tomy releases 1 to 5 new beys (average 3) every month.

For Hasbro, the intervals are larger. For example, new Burst Rise Wave are 4 Starters, then 3 single packs. Then we gotta wait 2-3 months.

Just my experience. It depends on marketing strategies and how fast the designers create designs for new beys.
Release dates for Hasbro are never solid when it comes to in-store availability.  It depends on if stores like Walmart/Target/Toys R'Us (Canada/other countries) decide to make orders for them for inventory.   Here's a good retail page for Hasbro Beyblade waves if you don't want to rely on the wiki: https://www.entertainmentearth.com/s/tops/p

In-store, Hasbro Beyblade availability is incredibly inconsistent from a state to state and even individual store to individual store.  In my area of Texas, the most recent wave we've received Slingshock Dual Pack Wave 3 while I've seen SwitchStrike Starter Wave 8 in California (ie. K1mbo's Beyhunt).  Canada gets Hasbro products the earliest from what I've seen and some of their stores are currently on Hypersphere.

Takara Tomy usually makes announcements through their Youtube page, Corocoro Youtube/Magazine, Burst App or promotion page inside their products.