SUMMARY
I love the new custom tiling feature! I think it's a great addition to Plasma. However, to fully replace Mudeer (https://github.com/darkstego/Mudeer) I would need to be able to use the custom tiling with the keyboard. Since the custom tiling is activated by pressing Shift and dragging with the mouse, and the "regular" tiling can be used with the keyboard by pressing Meta + arrows, why not add Meta + Shift + arrows to move windows to custom tiles by default? Or at least add the item in the shortcuts so people can add them manually.

Not a bug, just an idea for improving a little bit this awesome feature.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.26.90
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 6.1.6-arch1-3 (64-bit)
Graphics Platform: Wayland
Processors: 8 × 11th Gen Intel® Core™ i5-1135G7 @ 2.40GHz
Memory: 15.4 GiB of RAM
Graphics Processor: Mesa Intel® Xe Graphics
Manufacturer: LENOVO
Product Name: 20XYCTO1WW
System Version: ThinkPad X1 Yoga Gen 6