How large of containers do fruit trees need to be in so they can produce? Does it depend on the typ

So my Italian plum tree (grown from a pit under its mom's shade in a friend's yard), flowered this year for the first time, this is its 4th summer I believe.  It got transplanted into its current container, which it seems to like, back in winter, I'm thinking its like 8 to 10 gal.  My question is would it be possible for it to fruit next year in this size of container?  Or do I either need to plant it in the ground or find an even larger container for it?  My goal with fruit trees is to keep any that I have short enough for my 6 ft. 3 in. husband to reach the highest fruits, so it won't be getting gigantic ever.

Similarly do different fruit trees need to be certain sizes or have certain sizes of containers to fruit?  I know that there are people who have fruiting trees in containers, I just don't know the necessary size of said containers.

The landlord said maybe I can plant it in the common yard, but I'm not sure I want to do that.

looks like you are gonna be the expert on this.

I recently had a fig set fruit in a 3 gallon pot.   I get a few tomatoes when I pot them in 5 to 10 gallon pots.  I know of people getting things like lemons and papaya from 15 ish gallon pots ... we have to keep tropical stuff in pots and bring them in for the freezes

maybe you can plant a bunch of peach pits in that common area and then graft a bud from your special plum to one of the sprouts.   It will be next spring when they sprout, and if all goes well you can graft starting about now.   T-bud grafting is pretty easy, check out some youtube vids on it

I guess I'll have to experiment.  I moved said Italian plum tree to its current pot back in winter and it's happy, evidenced by it flowering, but hopefully next year the flowers will make plums.  As for whether to move it to the 15 gal. pot this coming winter, I guess I'll have to just guess.