Not unless you bought it and installed after you got done installing Windows
XP, as Office XP is a productivity package, where Windows XP is an Operating
System.
If you expected Windows XP to come with these, sorry to tell you
that neither Windows XP, nor any other version of Windows, has
ever come with these programs, or any other significant
application software.
You say "It is supporsed to be installed it." How do you know?
Did the vendor who sold you the computer bundle Microsoft Office
with the computer as part of the package? Unless it was part of
the terms of sale, you don't have it and that's why you can't
find it.