Amazon is usually a great bellwether for the stock and popularity of new equipment, as they give a detailed shipping estimate. They’re now showing that new orders for the EOS R6 (at $2499.00) “usually ship within 1-2 months”. The specific delivery estimates depend on location, and range from late-September to mid-October.
This implies that a second shipment of R6 is not expected until late-September, with a third in October, and dealers are still unsure if the second shipment will have enough bodies to cover all existing orders.
This is likely a better situation than the EOS R5 which is now showing no delivery estimate (was previously 2-5 weeks). It may be months before we see that camera in-stock and available.