Bulk insertion in laravel eloquent ORM

Please see the below details for data insertion.

I have to insert multiple records on two different tables at same time or optimized way.

Let's assume 2 tables : Table A, Table B.

Table A has 1 to many relationship with Table B.

Table A column : colA1
Table B column : colB1

Input : 
[ 
   { "colA1": "AAA1","colB1":"BBB1" },
   { "colA1": "AAA1","colB1":"BBB2" },
   { "colA1": "AAA2","colB1":"BBB3" },
]

Expected output :

Table A:(parent).

Id  |  name  
 1  |  AAA1   
 2  |  AAA2

Table B:(child)

Id | Table A id | name   
1  |      1     |  BB1  
2  |      1     |  BB2  
3  |      2     |  BB3  

We can achieve the bulk insertion by using insert or createMany methods for single table but i want to insert into two tables for designed relations