Why is my Kentia palm yellow and droopy? Since bringing i...
2
There could be due to an infection eg fungal infection but it cause also be a result of the lighting and watering conditions. These plants don't like too much direct light and prefer to a soak and dry watering schedule where they receive water and then their soil is allowed to dry. You can check when they next need a watering by checking the top inches of soil.
https://www.gardenersworld.com/how-to/grow-plants/how-to-grow-kentia-palm-howea-forsteriana/
https://gardening.stackexchange.com/questions/46772/kentia-palm-browning-leaves-and-yellowing-tips
https://greg.app/black-spots-on-kentia-palm-leaves/
https://www.gardenersworld.com/how-to/grow-plants/how-to-grow-kentia-palm-howea-forsteriana/
https://gardening.stackexchange.com/questions/46772/kentia-palm-browning-leaves-and-yellowing-tips
https://greg.app/black-spots-on-kentia-palm-leaves/
Looks like this might be scale! I would quarantine this plant if possible and spray and check your other plants if they have the same.