Is TPM really active?

Hello comrades, I have set up my openSUSE Leap 15 according to this wiki,_TPM2_and_FIDO2#Unencrypted_boot_partition

so that TPM and SecureBoot are active. The system consists of unencrypted boot partition and LUKS2 encrypted system partition.

Now how can I find out if TPM is really actively used?

sorry, crossposted here in German: