Please don’t take this the wrong way, I’m trying to be helpful, but as is so often usual, your queries will be answered first and foremost by using a search engine:
You can it seems track items through their website. It further seems, they hand the item over to Royal Mail for the final mile delivery. Download Royal Mail’s app to see if you can view the tracking number that UK Mail provide.
As always, with any of your delivery posts. You’ll get an update when there is one, and if you don’t just go to the relevant website to see if it has a tracking system.
Maybe it got delivered to your neighbour again
Maybe it fell off the truck
Maybe it got stolen by the delivery driver
Maybe you put the wrong address in when you ordered
Maybe the driver couldn’t find your property
All of which are out of your control, so just wait and see what happens or better still contact the company.
I hope you take this advice onboard and don’t start flooding this community with the same delivery questions all the time that are just slightly re-worded.