if driver is no longer loadable module and part of kernel where is it?

i have a new kernel version where when I was using its previous version, I had load the module driver using modprobe <module_name> as well as used with other associated commands i.e. modinfo <modulename>.

Now newer version of kernel has no longer ship the <module_name> module as a loadable module and instead they made it the part of the kernel. Now with this new kernel version, I see modprobe does not work apparently as it complains that it does not exist in /lib/modules/<kernel_ver>/.

Now the question is that if it remains as part of the kernel, where does to module reside? Thanks.,