You asked before already , and the suggestion of get a hard tail was Suggested, I guess You did not agree.

If it has a removable air-oll-Spring shock. search for a different one with the lock out feature, ( start Your web search .. Now)

Or Have a Dummy shock made that no longer Moves , and bolt it on in place of what You have ..

Read a Blog many years ago , a Guy who worked in a machine shop took a full suspension bike and Made it so It came apart easily ..
with the rear end made rigid, but removable to pack smaller , and Flew to places to Go touring On It.




..,..