There are actually quite a few websites with bits of information on the various aircraft. Some sites are mostly about flights the planes make, others only contain descriptive details. Some are all about capturing photographic images of the planes.
The flight-tracking sites usually contain a descriptive profile of the plane to go with flight information or their photographs. Some sites are volunteer-supported, others are not. Well-intentioned, I would say yes.
No one site has everything, and not everything is updated, so you kind of have to bounce back and forth until you cull together the information you seek.
In wondering if VP-BOE (the second plane mentioned in the article would be the registration of the 6th A320 for Jetlines before it becomes C-GJLY, planespotters.net says it is VP-BET.
https://www.planespotters.net/airframe/airbus-a320-200-vp-bet-aeroflot-russian-airlines/enlx48 Last flown two weeks ago, from Munich to Ostrava in the Czech Republic.
https://www.flightaware.com/live/flight/VPBET Aeroflot livery painted over, but no picture showing Jetlines livery as yet.
https://www.planespotters.net/photo/1574598/vp-bet-aeroflot-russian-airlines-airbus-a320-214wl The briefest list of the six C- call letters, the last two are the ones not currently active...
C-GCJK, C-GCJL,
C-GJLH, C-GJLQ, C-GJLT, C-GJLY
https://www.planespotters.net/airline/Jetlines?refresh=1 When these last two planes start flying scheduled flights, or when they are re-positioned, flights information should become available at sites like flightradar24, flightaware and radarbox. Paying for a membership would get you historical information beyond two weeks' past.
The sooner these planes start flying revenue routes enough to be cost-covering and/or profitable, the better.
Previously posted...