Answers for "get taxonomy by id"

get taxonomy term id from slug - WordPress

<?php 
    $term = get_term_by('slug', $slug, 'category'); 
    $name = $term->name; 
    $id = $term->term_id;
?>

get term id

get_queried_object()->term_id;

get taxonomy term meta by id

get_term_meta( int $term_id, string $key = '', bool $single = false )