Apple develops and manufacturers a lot of hardware (one of the few positive things I'll plug them for). I would definitely consider them a generic "hardware giant" in that context. Much of this hardware are phones, watches, laptops, and peripherals. I know their server/datacenter market is traditionally pretty slim but don't know what it typically looks like. I know AWS recently announced Mac EC2 instances[1]. The fact EC2 has been so dominant and Apple hardware in EC2 is just now arriving gives much merit that they're not in that much demand in datacenters. I work in research and have only encountered a handful of instances where projects interfaced with Apple hardware (especially in a datacenter) but there's no reason that couldn't shift given Apple's capital and talent pool that already exists.
[1] https://aws.amazon.com/blogs/aws/new-use-mac-instances-to-bu...
They're a luxury brand and they make money off of selling personal lifestyle computers. Often good quality, and, yes, the M1 looks fantastic (literally just bought my wife a new M1 MacBook Air) but this is a company that doesn't even really sell a commodity desktop machine. I cannot see them going head to head against SuperMicro.
Maybe, _maybe_, they'd license M1 out, but I doubt it.