"I built out a list in Google Sheets and I ultimately want the full list to be formatted a certain way (example, all cells should have bold text) but I'm still building out the list. Going back to update the cells or updating as I go is tedious.."
Set up Conditional Formatting when you begin so that you can enter values in a column and they will automatically be bolded as you go.
From the top Navigation within Google Sheets, click "Format" then "Conditional Formatting"
Within the bar that pops up on the right, click "Add another rule"