Likely not Boeing’s fault, probably the airline. Boeing provides the door opening and the airline puts in the plug because they want to squeeze a few more seats in. They only need 50 seats per exit.
Apparently Alaskan Air took delivery as is just two months ago. The door plug, like the rest of the 737 Max 9 fuselage, is manufactured by Spirit AeroSystems, a Boeing supplier out of Wichita, Kansas.
“Boeing provides the door opening and the airline puts in the plug”
According to several fairly authoritative remarks I’ve read that’s not the case.