A “fairly powerful laptop with an integrated GPU” is a bit of an oxymoron, if the term powerful is supposed to include also graphics performance. 
That being said, when launching a new project, you could try setting up scalable renderer preset, which has much more restricted feature set which could possibly run on iGPU.
Non the less, you have two individual compatibility issues which together reduce your chances close to 0. Linux is the least UE5 friendly PC platform, so the engine is least compatible with it, and intel integrated GPUs have also generally poor feature support.
Having high end dedicated nVidia GPU on Linux would give you fair chances to run UE5, and so would running intel iGPU on Windows, but the combination of Intel iGPU and Linux OS really slims down your chances of having good time using UE5.
I’d recommend checking out Godot engine. It’s far more suitable for Linux OS and low end integrated GPUs.