I was able to get aptX-LL working on a stock Dell XPS 15 once, but only "working" in the sense that once you use the older driver for the Intel 9560 wireless adapter, you WILL have lower latency, but you will also have annoying pops and clicks.
The easier way is to use a little USB bluetooth adapter that supports aptX-LL.
I have only ever seen mentioned once online that you can use a USB type-C to type-A adapter plugged into your Android phone, then plug in your aptX-LL compatible BT adapter, sync your LL-capable BT earbuds, and actually achieve low latency with bluetooth on your phone. While having this big stick sticking out of your phone (hint: use a right-angle USB adapter). And it still makes some clicking noises.
But even easier, and by far my favorite option, is to pick up a pair of wireless gaming headphones (for god's sake, *without* Bluetooth) and plug its USB dongle into your type-C adapter on your phone. Then you have no need to pair, the latency is far lower than even with aptX-LL, and you won't have any annoying clicks.
The hardware I'm talking about is a Reiyin WT-04, Razer's previous hammerhead earbuds (they also hurt in my left ear), Sennheiser's Momentum True Wireless (very good, and yes they support LL but I don't use it) and HyperX Cloud Flight are the headphones (like them a lot).