Alaska Airlines also have 32 Q400s, all operated from new by Horizon Air. Spent a lot of time up and down the West Coast and British Columbia on those!
As for the Flybe airframes, Airfleets has full lists of stored and historical fleets. Any aircraft that have found further use or a new owner are listed in Historical fleet
Historical (transferred to new operator)
https://www.airfleets.net/flottecie/Flybe-history-dh8.htm
Stored (not having found further use)
https://www.airfleets.net/flottecie/Flybe-stored-dh8.htm - I can only imagine they are still parked where they last landed in March, but not sure
The eleven airframes transferred to Canada (via Skyworld, a remarketer) are included in the historical list which gives the fates of each one. G-KKEV was the first delivered to Canada to Conair (in Flybe colours). These are all for firefighting tanker conversions (Q400AT)
G-KKEV is now C-FFQG and was seen fitted with a belly tank and fully operational as such in May
https://simpleflying.com/flybe-water-bomber-dash-8/
One other ex-Flybe airframe, G-ECOI, has found a new home with Cobham Aviation in Australia. Now VH-IYW, delivered in April 2021 and enjoying a busy life in Western Australia:
Airfleets
https://www.airfleets.net/ficheapp/plane-dh8-4224.htm, Flightradar24
https://www.flightradar24.com/data/aircraft/vh-iyw, Jetphotos
https://www.jetphotos.com/photo/10142958
There is a phoenix operation, dubbed "New Flybe" which has actually secured a commercially very important 86 slots at Heathrow for this summer from British Airways. They have one Q400, G-CLXC, albeit interestingly it's not a stored Flybe airframe, but a much older ex-Tyrolean and Austrian Airlines OE-LGA ferried from Zagreb to Exeter in February. Presumably cheaper to acquire than the Flybe airframes!
https://simpleflying.com/flybe-2-heathrow-slots/
https://simpleflying.com/flybe-2-0-...g-a-reality-with-first-aircraft-registration/