Call a family meeting. Make sure you and Dh are on the same page and that you know what you will be talking about ahead of time. Keep on topic. Have a tick list and write down what is said.
Tell them you are raising them to be capable adults, point that out to them that everything you both do now from working a full time job to meal planning, cooking, cleaning, dusting, hoovering, laundry, booking dentist appointments, haircuts will all be their responsibility and if they go to uni that is in 2 years for your eldest.
From now on you want a family dinner with no phones on. Lay out your expectations. Helping cook dinner is one too. They are responsible for doing the dishwasher, they can all do that. The eldest two can do the weekend loads so a Sunday and a Monday. They do 2 days each per week. I used to do a Friday load only and I only had 2 teen boys.
And they lay out the consequences, in fact ask them what they think a fair consequence would be. They know in school what the expectations are and what the consequences for behaviour or homework not handed in.
Tell them you are getting a new router so that you can cut individual devices off (google this, we have 2 routers and we can absolutely cut individual devices off as we assign permanent IP addresses for them so we know we would cut the computer and not the printer in error) their phones and contracts are dependent on them doing what they need to do.
Set them up to succeed. Have a daily rota showing what they should be doing then no one "forgets" that includes kitchen bin emptying on set days, they are already leaving the house for school so they take the bin bag to the bin and on the bin collection day they wheel it to the kerb. Start delegating.
The way we did it, everyone was off their devices at a set time say 30 minutes before dinner and all in the kitchen, they can stir the pan, grate some cheese or whatever, set the table, get things out of the fridge or cupboards. After dinner no one gets to sit down until everything is cleared away, all stuff into the dishwasher, hand washed items are dried and put away. Everyone is involved. We always put music on and we did this since they were in primary. I was a sahm so all they saw was a man went to work and Mummy did the housework. I pointed out their teacher is a woman, she works, who does her housework? Made them think.
Oh and weaponised incompetence would have been met with well you will just have to do it more to get good at it.