Did China make pledges to the previous Philippine president Rodrigo Duterte that could be described as a “trap”?

In a May 11, 2022 tweet, (self-described "public educator, academic, columnist, and policy adviser") Richard Javad Heydarian^1,2 first asserts that China took the previous Philippine president Rodrigo Duterte "for a ride";

...China offered him billions of dollars, offered him concessions in the South China Sea where the two have maritime disputes. Guess what Christian (Amanpour), forget about debt-trap, this was "pledge trap".

and goes on to elaborate.

Question: Did China make disingenuous pledges to the previous Philippine president Rodrigo Duterte that could be described as a "trap"?

Heydarian suggests that Duterte was at risk of being trapped in some way not by actual debt to China, but simply by attractive pledges made by that country. Which pledges were most attractive to Duterte and therefore most likely to have influenced him towards a more pro-China stance?

• ¹ https://www.brookings.edu/author/richard-javad-heydarian/
• ² https://trendsresearch.org/expert/richard-javad-heydarian/