A very small number of teams aren’t well funded, have sponsorship issues, or whatever else and actually run less than top end components. I don’t recall who but there were bikes at either TDF or vuelta maybe last year with group sets which you could’ve just gone to the store and bought better ones.
Recumbent bikes have been banned since 1934[0]! Remarkable machines. I'd love to ride one in a civilized location one day.
[0]: https://en.wikipedia.org/wiki/Recumbent_bicycle