When you do a google image search of the individual plants images from tesselar site the same images on multiple sites come up (although sometimes with "adjustments")

If you look at the second image on this
www.waitrosegarden.com/plants/_/rosa-timeless-pink-noa1811108-pbr/classid.2000036974/

It's the same image of Showpiece Blush...just with the saturation up and rotated clockwise 90 degrees (ie note the torn petal at the bottom on tesselar is now on the left)

that's probably not the best example, it does also have the same full bush image from the tesselar site (again with saturation changes). but then even RHS site is doing increased saturation like on
www.rhsplants.co.uk/plants/_/rosa-timeless-pink-comeback-pbr/classid.2000036974/


Showpiece lipstick image on tesselar same as on
www.vanmeuwen.com/p/rose-charisma/v68275VM
and
www.willowbrooknurseryandgardencentre.co.uk/rose-timeless-charisma-4l/p10194

An uncropped image of Showpiece Champagne (4th image in the slider/carousel)
www.crocus.co.uk/plants/_/rosa-timeless-cream-noa1112130-pbr/classid.2000036972/

Has the Showpiece Berry image, but again saturation has been increased.
www.crocus.co.uk/plants/_/rosa-timeless-purple-noa38121-pbr/classid.2000036975/
another same image (without increased saturation)
www.garten-sauer.de/de-de/shop/artikel/1324/rosa-laudatio-r-bt-all-in-one

There's a bunch of other sites but none of them are perfect, some don't have the breeder code and the other new Timeless series name (Cream, Pink, Red, Purple). It's a bit of piecing things together work. Still early in it's release cycle though so more conclusive evidence is likely to turn on in the next year or so.