Most trips start at Baghdad International Airport. You do not want to hunt for a shop or fill out SIM card paperwork after a long flight. With an eSIM you install it at home, then switch it on after you land and it joins Korek or Asia Cell on its own.
Across central Baghdad the signal is steady. Asia Cell tends to give you solid 4G around Karrada, the Green Zone area, and the main hotel districts. For a short city visit the 3 GB for 15 days plan at $5.17 is a comfortable fit. You can use maps, message family, and call a taxi without watching your data drain.