Not the worst I've seen, they should thicke up with some air movement, air circulation in the tent is critical as they need constant fresh air exchange to build up nice and strong.
Good Luck!
Se estiraron un poco en su etapa de plantula. Pero los espacios internodales no están muy separados. Sólo repetiré lo que dijeron todos los compañeros rellena tu maseta con sustrato hasta los cotileidones (las dos primeras hojas redondas). También puedes agregar un ventilador oscilante para mayor circulación de aire y darle un leve movimiento a tu planta. Esto favorecerá el fortalecimiento del tallo y ramas. Suerte
It's fine if you add some soil the part underneath the soil will sprout roots from it as well. If I were you I would add some silicate (I use advanced nutrients rhino skin) to my nutrients so the stalks will get thicker and stronger.
Good luck with the rest of your grow
Ad few cm lair of soil i presume. Roll down like socks fabric pot, create wind, aka use oscillating fan.
They look behind , lanky, but healthy, sort things i said, all should go better