From having only 5 members, the number of people in my team has consistently (developed/changed)
Can I use developed in this situation with the same meaning as "increased"?
Thank you very much for your help.
No. "Developed" doesn't work in this sentence, and "changed" could mean that the team now has fewer members; it would just mean that the number is now different. If you mean increased, you should say increased.
P.S.: In English, we normally spell out small numbers in text, so we'd write "five members".