Hedge that's not massive, good for wildlife?

[WildFlowerBees]

And keeps dogs from doing their business on the grass.

On one side of our house we have some redundant grass area and a hedge on the front. I want to remove current hedge and plant something that is good for the wildlife, looks lovely but isn't too unruly as I don't much like gardening so pruning etc won't be top of my list.

I'd prefer native, was thinking about crab apple?

Crab apple will need trimming to keep it hedge height.
Mature trees grow to around 10m in height. They have an irregular, rounded shape and a wide, spreading canopy.
www.woodlandtrust.org.uk/trees-woods-and-wildlife/british-trees/a-z-of-british-trees/crab-apple/

native hedge ideas, they will all need trimming though.
Trimming is essential for long-term hedgerow maintenance. The newly planted hedge will need an initial trim within the first couple of years to encourage dense bushy growth.
www.woodlandtrust.org.uk/blog/2022/10/9-best-hedge-plants/

Low maintenance, so less trimming, but not all native.
www.gardenersworld.com/plants/best-plants-for-a-low-maintenance-hedge/

you will need to check the current hedge can be moved, many cant

Established older hedges are far better for wildlife than any newly introduced one, they have so many symbionts in their roots, for example, that take decades to establish

I'm considering hornbeam as it's good for wildlife and keeps it's (dead) leaves in winter, but does need pruning.
Yew needs less pruning, as it's much slower growing once the leader is pruned at the desired height and is also very good for wildlife I believe. If you've got free draining soil it might be a nice option.
A mixed native hedge is probably the best for wildlife, but they definitely need pruning.

Yes, this. Can you make the existing one work?

Hedge we currently have isn't very old - 4 years planted by the company who built our house. I have no idea what it is, it's green that's about as much as I know. (Useless gardener sorry)