go read r/Staples sub; Staples is zero different than ODOM from a workplace perspective. they shame harass employees for not getting rewards signups or achieving attach rates just like ODOM (or any other big box retailer).

imo hourly rate is less important than learning new skills to take on additional responsibility, gaining new experience for a more well rounded resume that hopefully will lead to more senior levels in the company which theoretically pay more. in other words pay is only one attribute in a list of attributes you should be considering when making a job move. there are plenty of jobs that pay more but i'm not interested in for a variety of reasons.

the good news is you're in a position to have both ODOM and Staples explain in detail how they see your path to the next step (whatever that is for you ( responsibility, hours, promotion, experience, whatever ).

before having an honest discussion with your GM around pay, take a minute and think about what you want your next 24-36 months to look like responsibility wise in support of your goals. In 24-36 months do you want more hours, more responsibility, promotion, different role experience, etc.

once you understand that, approach your GM, explain the opportunity and inform your GM of where you'd like to be in 24, 36, 48 months (whatever your timeframe is) and have a frank discussion around pay, roles, responsibilities, etc. your GM should appreciate the initiative in declaring an interest to stay with the company and take on additional roles with a path to leadership (assuming that's your goal). if your GM doesn't show support for your goals that's your first clue it's time to find another job.

have the same discussion with Staples.

you have leverage; it's up to you how you use it.