Maybe add a smaller oven that you can place inside buildings.
Take it back to legacy and add a second type of oven that holds 4 baked goods and can be placed inside a house.
The only reasons I can think of that the current oven cant go inside is the height of it or the toxic gas produced by burning inside a closed area.
If its the first reason then can we get a smaller oven that can fit inside? I dont really see how it hasnt been thought of yet.
if its the second reason then why can you build a cruciable inside? as well as a normal fire? One uses coal which can be considered more toxic than burning wood and the other burns wood just like the oven does.