I had a loose colony of solitary bees living underground in part of my front garden last year. I haven't checked if they're still there. It was only when I saw them up against a honey bee I realised they were much smaller.
I had bumblebees nesting in one of my compost bins earlier this year. I let them be
Either badgers or foxes ripped through the wooden side of the compost bin to get at them and although I've seen a few going into what remains of the compost bin, there's nowhere near as many.
I do my best to ensure there's food sources for all of them in my garden by growing plants which flower at different times throughout the year. But I have to admit they are just 'bee-friendly' plants rather than for any particular type of bee.