Relationship between Tantra and Buddhism

Not Tantra and Buddhism, but Tantra and Hinayana;

The Han Chinese Buddhism is mainly Hinayana;

Tantra began to exist during the Tang Dynasty, and the Tantric Buddhism in Japan is the result of the Tang Dynasty;

And in recent years, the newly-excavated underground palace of the Famen Monastery, the outside of the box that contains Buddha's bones and relics is engraved with a tantric mantra, which has been shown in TV.

There is another point,

Buddhism has more than one Buddha and Bodhisattva;

Shakyamuni Buddha, Amitabha Buddha, Medicine Buddha, which are all common;

And there is a common practice in Hinayana monasteries, which is to worship the 88 Buddhas as a penance;

Seeing that there are a lot of Buddhas in Buddhism,

Hinayana Buddhism believes in Buddhas, but does Tantric Buddhism believe in them?

Believe;

There is not one who does not believe.