I'll always remember looking at a 4GL (fourth generation language) telecom app in late 2012 at an insurance company. It was used to route, via prompts, the caller to the right service desk.
So, I embarked on an informal security assessment/threat model by handwriting on my notepad "sources | sinks" then enumerating my perceived/observed of each. After that we walked through the business logic, error/exception handling & misuse cases. It was not the most thorough affair, but it was a value-add to the Cyber folks.
As the industry embraces more no/low code solutions (Power Apps, Honeycode, AppSheet) it behooves Cyber professionals to use a methodology to assess these solutions. Here's a take on such a methodology that I'll pronounce DASL:
D for Data: classification/sensitivity/compliance requirements/retention
A for Application: underlying platform (Cloud Service Provider: CSP) & security/risk/SRE/DR posture
S for Sources/Sinks: ecosystem/supply chain
L for Logic: ruleset, QA testing, misuse cases