Configuring MFA on Rocky Linux 8 with PW+OTP

Linux noob here. Pretty much the title. I tried referring to published articles but I couldnt find something related to my specific requirement. I cannot log in using the OTP code even though I give the correct password and the code. Could someone help me with the sshd config file and the pam config file to make this work. Additionally I might want to have this feature enabled for a selected amount of users. (Ex: allow root login no) Any help on this would be greatly appreciated Thanks! *I tried using the Google Authenticator