Downstairs loo has concrete floor and soil pipe is in floor at 225mm center from wall. Old toilet is cracked and has to replaced, maker not evident.

Available toilets all seem soil pipe out of back models or close coupled with soil pipe
At about 122mm center from wall meaning flexible connector would be compressed and flow restricted.

Therefore I need a toilet I can mount against the wall and align with soil hole. Mounting further forward would be unsightly and bring a knees against door problem.

Don't want to raise toilet or hack at cast iron soil pipe in floor.

Your numbers don't add up to any standard size toilet bowl. Over here we work in inches and the standard rough from center is 12" (304.8mm) While they do make a 10" (254mm) bowl 12" is the standard.
Measure the distance from the wall to the center of the opening ion the floor and let me know what you come up with. Back to you, Tom