Now that we have a product name, let's look at this like a scientist or researcher.
First, I looked for scientific research studies or scholarly articles of Bioptimizers magnesium, or any of their other supplements. Nothing!
Then I looked at scholar.google.com. Nothing!
Then I looked through pages and pages of the search "BIOptimizer Magnesium Breakthrough" on Google - all are sponsored, or ads from places like Amazon. Even the youtube reviews are sponsored.
Hmm, really looks like a lot of self-promotion. What do scholarly articles say about magnesium? A lot, actually, including that it MAY help reduce pain.
https://www.mdpi.com/2072-6643/12/8/2184
But, again, there are no scholarly reviews to demonstrate that there are significant difference between supplements containing one or two types of magnesium, and those containing more.

As to whether we really need a magnesium supplement at all, read here:
https://www.webmd.com/a-to-z-guides/magnesium-test
Remember, as with all substances, more is not necessarily better. And your food and other supplements provide magnesium as well. Magnesium in excess of what your body needs is excreted by the kidneys - in other words, you produce expensive urine. If you have stomach, lung or kidney conditions, you can have side effects like gastritis, diarrhea, respiratory distress or worsened kidney disease.
Magnesium can also interfere with the effectiveness of other medications, and in the case of cardio and blood pressure medications can cause side effects.

Now, one more check. What does a magnesium supplement cost from BIOptimizer? On their Web Site 60 capsules of 250mg magnesium each or a 30 day supply costs $27.20 (The label says one dose is 2 capsules) On Amazon, it is $39.00 In other words, about $1.00 to $1.30/day
What does a magnesium supplement cost from other sources? Looking at several from known supplement companies, 500 mg (from 2 to 8 types of magnesium) costs between $.10 and $.25 per day.

So, if I was thinking about supplementing magnesium, I would look at all the other things I eat and supplements I take to see if I already get enough. Then I would look at my prescriptions and see if it might interact with them. Finally, I would run it by my doc just to make sure I wasn't missing anything.