So low-code is faster to get started with little programming knowledge but isn’t expandable. OTOH, a language and framework that you’ve taken the time and effort to learn takes a little longer to get started but is ultimately more suited to more complex tasks.

I think the takeaway from the narrative here is knowing when to switch from the low code platform and call it a PoC. I’d have cut that off around the point that the custom lambda came into play. That way you’ve used the low code environment for what it’s good at, creating something “they” can react to and easily explore basic functionality. While at the same time you’re taking those learnings and building the more robust solution.