Q.Heavy, Not Very Good Soil In Garden
Would putting some small chips into the hole before I plant my shrubs in the garden, would this be beneficial?

Certified GKH Gardening Expert
I would choose something else to amend the soil with. There is an array of problems that you must overcome when amending with wood chips. Not that they don't make a good amendment, but it takes quite a bit of time and effort for this to work into the soil and become usable.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/how-to-improve-clay-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/compost-as-soil-amendment.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/improving-garden-soil.htm