I have a string which contains a ‘48.6 X 90.6’ at COLUMN DIE_SIZE. I want to split this string into size_x and size_y. I can only find a way to split the die_y

Example String:

DIE_DIZE
48.6 X 90.6
77.9 X 57.0
47.0 X 40.0
57.0 X 71.0
61.0 X 80.0
54.5 X 74.0
42.0 X 40.0
80.0 X 85.0

I write SQL by regexp_substr but i can substring only DIE_Y.
Why is this happening and how can I fix it?

   select distinct  
                DIE_SIZE   ,
                regexp_substr(replace(replace(DIE_SIZE,' ',''),'x','X'), '[^X]+$', 2, 1) as die_x,
                regexp_substr(replace(replace(DIE_SIZE,' ',''),'x','X'), '[^X]+$', 1, 1) as die_y
                
                from ORD_DIE_LOT
                  

output from sql

Expect output