Macbook Pro M1 Battery maximum capacity is 98% in 30 cycle count.

If you mean the Battery percentage listed on the menubar (not a third party app), then this is perfectly normal since macOS now exercises the battery to prevent battery damage for people who keep their laptops plugged into the charger all the time. See these two Apple articles:

If your Mac battery won’t charge completely - Apple Support

Get help with your Mac notebook battery - Apple Support

Health % is a calculation based on a "nominal" or average capacity value. The vagaries of the manufacturing process for lithium batteries means that no two batteries have exactly the same capacity. Calculations use the design or average capacity, not the actual for one individual battery, to calculate health.

This is true independent of the computer brand.

My second MacBook Pro was supposed to have a battery design capacity of 5770 mAh but its actual, per Coconut Battery, was over that. The computer showed 102% for a couple of months until it passed about 15 cycles.

Please don't obsess over a calculation that is, by its basic nature, determined by inexact numbers. You computer battery is just fine.

In addition to the good advice already posted, I would like to add:

Batteries are a wear item, like the soles of your shoes or tires or brakes on your car. Batteries deteriorate strongly with charge cycling, but they also deteriorate slowly with TIME.

You will eventually have to replace that battery, possibly based on time alone, even if you barely used it for the entire time you owned your computer. Exactly when you will need to replace it varies wildly from battery to battery.