VTP operation over trunks

The VLAN Trunking Protocol (VTP) operates only over trunk links. Switches will not share VTP information over access ports.

Links:

https://www.ciscopress.com/articles/article.asp?p=29803&seqNum=4#:~:text=Because%20VTP%20runs%20across%20trunk,is%20also%20propagated%20by%20VTP.