That's because it isn't true, the replacement is the $599 iPad Mini 6 which is in a completely different class of tablet. Even the $300 iPad would outclass it by a mile.
Mini 6 has regularly been on sale for $499 as well since it is now long in the tooth already.
If I want a mini with cell, it's 800 eur, which might be 600 moneys where you live, but VAT is included here.
Actually, 64GB mini with Wifi+Cellular is 869 eur in Ireland, just checked there. When I bought my original mini, it was the cheapest new iOS device with a cell radio.
The original iPad mini 2 with cellular was $529 when introduced ten years ago, not $300. The current iPad mini with cellular was $649 when introduced one and a half years ago. Both of those numbers are the actual US Dollar prices for both products. Your pricing information is not correct.
I find this hard to believe. A $300 iPad mini 2 from 2015 is comparable in specs to an 800 Euro 2023 iPad Pro?
Edit: Actually, you can compare them directly on Apple’s website:
https://www.apple.com/ipad/compare/?modelList=ipad-mini-2,ip...
Even the current iPad mini (6th gen) blows the iPad mini 2 out of the water.
https://www.apple.com/ipad/compare/?modelList=ipad-mini-2,ip...