Daisy chain MacBook pro M1 to displays dell

Hello apple community.

I bought two DELL screens, the first is connected with an official Thunderbolt 4 cable and the first screen is connected to the second via displayport (IN and OUT). The MST protocol is enabled. However, the display still remains mirrored. And in setting computer, i see just one displayscreen.

Dell support confirmed to me that the first must be thunderbolt.

I confess to being lost. If anyone has an idea I'm all ears.

THANKS

First screen : U2724DE

Secondly screen : U2723QE

French to English translation of response support dell:

"Configuring multiple monitors in a daisy chain

Macs support daisy chaining of monitors using Thunderbolt 3 connectivity.

Typically, the Mac can support up to two monitors in a daisy chain configuration (one monitor directly connected to the Mac and the second monitor connected to the first).

To daisy chain, the Mac must have a Thunderbolt 3 port and the first monitor (connected directly to the Mac) must also support Thunderbolt 3 (for example, the Dell UP2720Q monitor supports Thunderbolt 3).

The resolution supported by daisy-chained monitors may be lower, depending on the bandwidth required by each monitor."