Need advice on changing taste preferences

How does one change a toddlers taste preferences? My kid is 22 months and has developed a preference for sweet foods - fruits, gerber cookies and daycare snacks (they unfortunately have added sugar in them). He also has a dairy allergy and I am struggling to get him to savory foods. Admittedly his solids journey was less than perfect and we went from BLW to spoon feeding and now back to self feeding. I work full time, switching another daycare is not an option now. I try to eat dinner with him but he is distracted everytime dad comes home. As of late he has been skipping dinner and going to sleep, then waking up MOTN screaming for food. We cosleeep so when he is awake it’s hard to enforce the rules. Partner is no help with most things and I’m stuck navigating this myself. Could use some guidance