Biden on public honors. Where is he?

There are several issues.

Honoring the Confederacy or its leaders with public statues or even monuments, or on stamps or the currency, or by naming military or public property such as schools or streets, etc., after them.

Similarly honoring the Founders such as Washington, Jefferson, or Hamilton, or Union leaders in the Civil War including such as Lincoln, Sherman, and Grant.

Similarly honoring leading figures in the history of the European discovery, exploration, and settlement of the Americas.

Similarly honoring leading figures in the expansion of the US to its current reach, including figures celebrated for defeating Indians (the Seminole Wars, just for one example) or defeating Mexicans (Texas' War of Independence from Mexico and the Mexican War).

Trump is volubly and publicly committed to defending all of the above.

Similarly honoring leading figures of the historic resistance to slavery (Nat Turner, for example) or in the movement for its abolition (Frederick Douglas, Harriet Tubman. etc.).

Trump is unhappy with replacing or even supplementing President Andrew Jackson on the twenty dollar bill with Harriet Tubman.

Similarly honoring leading figures in the historic resistance to the European discovery, exploration, and settlement of the Americas.

Similarly honoring leading figures of the historic resistance to the expansion of the US to its current reach.

Honoring any of the above privately rather than publicly by, for example, naming private schools or private streets after them or putting up statues or monuments at private clubs or schools, etc.

This is where Trump says Biden is.

All I could find from Biden or about him in news media is this.

Keeping his head down and his mouth shut?

It is a minefield out there.