Only the three 403b withdrawals appear on 1040 line 4a, but all 6 are included in 1040 line 4b. The withdrawals from the 403b's all show under Pensions and Annuities instead of under Traditional IRA Distributions on Form 1099-R Summary.
The Form 1099-R's should be showing on Line 4c and Line 4d on Form 1040-SR. If they are not showing there:
If no amount is shown, you need to select Start or Edit/Add and review the 403(b) information you entered.