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The technically correct answer is that Torque-To-Yield bolts are single use only.
That said, there are plenty of people who reuse them and do not have issues. I'd never suggest reusing TTY bolts for say, a cylinder head, but for a component where failure will not be catastrophic, you might be prepared to risk it.
For example, the aluminium undertray on the M2 has 8 x TTY bolts. If one of them were to fail, basically nothing will happen. Heck, if all 8 of them fail (how likely is that?) the tray might fall off but the car isn't going to explode or run off the road. Checking these at each oil change will satisfy all but the most pedantic of users.
Suspension bolts? Probably somewhere in the middle. A failure could be a big deal so you should consider the risk associated with saving some coin.
PS. Those strut & shock mount gaskets are just pieces of paper. They can get a bit sticky and tear when you pull the shocks out but if they hold together, there is no issue reusing them at all. Mine held together just fine.
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