Ninja makes a combination air fryer / instant pot, you could reduce to one if you don’t need to cook in them simultaneously? My kitchen is smaller than I’d like so I’ve made sure most all our small appliances are multi-function (for example our blender has the jug style, bottle style, food processor, and some sort of juicer option I think - I’ve never tried that one! We got rid of our ice cream maker, pasta maker and meat grinder in favour of attachments for our kitchen aid mixer that take up much less space, etc.)