What things to improve in your petition letter and proposed endeavour statement of chen immigration attorney

hello guys,

i am preparing my documents for my NIW petition. i heard that recently denials are on the rise. my hired lawfirm is chen.

they have almost prepared my petition letter and proposed endeavour statement.

however, I heard that the client needs to put effort in the petition letter and proposed endeavour statement especially in the current times.

what things did you guys include or modify in your petition letter? I am in stem (computational material science) and from nepal. any tips would be appreciated. thanks.