MacBook Pro 2017 daisy-chaining with DisplayPort

I have a 2017 13" MacBook Pro (with two USB-C ports) with Mojave and wish to use it to daisy-chain a display to two external monitors through DisplayPort. Unfortunately, it seems that although the hardware supports this, MacOS itself does not support multi-stream transport - the two monitors in the chain are mirroring their display with no option to extend instead. **Is there any third party driver or other software available to make this work as intended in MacOS?** If not, what would be the best alternate solution to get it working? Ideally, I'd like to avoid buying a separate £200 dock to be able to use multiple monitors and still power the MacBook as well. The monitors in question are Dell U2515h if that helps - they support daisy chaining through DisplayPort 1.2, although ideally, I'd also like to be able to chain to another monitor too.