Yes it is. The NuGet package is only been 64 bit. You can still get a 32 bit installer. (http://download.milestonesys.com/MIPSDK/MIPSDK_Redist_Installer_x86_2022R1.msi )
Please note that this is the last version where you can get installers so this is the last version where you can use 32 bit. Ref. https://msdownloadcdn.azureedge.net/files/XProtect%202022%20R1/Release%20notes/Release%20Notes%20-%20MIP%20SDK%202022%20R1.pdf