Version 13 and above has a new multi edit capability in List Views.  It works like this:

1. Select all the records you want to update.

2. Verify the count (if you have more than 80, you won't see all of them on the screen).

3. Edit ONE of the records.

4. Verify that the edit should apply to all records.

Result:

Note: The Bills of Materials Menu was created specifically for this situation and the Tree View was defined with multi_edit = "1"

UPDATE: Instructions to self-implement this in Odoo 16:

1.  Activate Developer Mode

2.  Settings --> Technical --> Database Structure --> Models

3.  Find and open the Bill of Material Line (mrp.bom.line) model

4.  Scroll to the bottom and click Create a Menu - name the Menu, and for the Parent Menu, search for Manufacturing / Products - then click Create

5.  Refresh your browser to see the new Menu, and navigate to it.

6.  From the Debug Menu, select Edit View: List

7.  Create your custom List View like this:

You can copy and paste the XML from HERE

This view allows you to update the Components in batch for every BoM as well as update Quantities in batch.  It allows you to search for a specific Component to see which Parent BoM it is used in.

Note: Your Odoo Consultant or Odoo Partner can help you do this if you run into any difficulties.