
Some things that can be really useful when you're disabled and bedridden (or even just tired or sick) :
*Bed desks - I have two of these which I use for food, laptops, etc. I have an all bamboo one and a larger wooden one with metal legs. I've seen ones without legs that you balance precariously on your legs or lap and while those are generally cheaper than what I have, the ones I got were quite affordable and I definitely wouldn't consider the no-legs ones comparable in terms of functionality. You will want to know how wide it is and what height it opens to so you will know whether your legs fit comfortably under it. These are incredibly useful even if you aren't disabled.
* Wedge pillows - these can make it a bit easier and more comfortable to breathe if you have asthma or just a really stuffed up nose. Obviously not a replacement for necessary medications or supplemental oxygen, but it can make it easier to breathe and therefore sleep if you're having difficulty breathing for one reason or other. You can put your regular pillow on top of the wedge pillow. I wasn't sure how I could possibly feel comfortable sleeping on one when I first got mine and I still don't use it all the time, but there have been times it's the only thing that allowed me to feel comfortable enough to get to sleep at night. These are relatively affordable though they are going to seem expensive for a pillow.
*Smart lights - unfortunately these often make it easier for companies and hackers to spy on your activities due to the fact that most commercial ones work via wifi and may even insist on you logging in to a company website to manage them, but they are also so helpful for people with mobility issues (and at least they aren't a wiretap like the Alexa or Echo). If you can find ones that don't require internet access (maybe custom-designed) that would be ideal, but regardless I found these an immensely helpful morale booster during the time when I was bedridden and felt like I was dying (and no, I have idea what that was about). They helped me to feel much more independent while I languished in bed. If you can turn the lights on and off from bed you can operate more comfortably while awake and get to sleep easier when you're ready to go to bed. Many are operated by smartphones and can even change colors. Be careful with these if you have epilepsy, though--they often have blinking light presets you might accidentally press and some even blink briefly by default if they need to be initialized or the settings get messed up. These can be rather pricey, but they are very useful.
Feel free to contribute ideas in the comments.