Reasonable adjustments are a funny thing - often it's hard to know what we need. For those of us who were undiagnosed until adulthood we've often either don't realise things we do are actually adjustments, or we don't understand the underlying reasons for a preference... Add in generations of undiagnosed and unsupported family, many of us have family ways of doing things that are actually adjustments.
Some examples:
Finances
I struggle with budgeting because I forget important payments that are due. My maternal grandmother, in retrospect, also had problems in a similar way. What I learned from her was to put my money into pots for important expenses that couldn't be skipped - literal pots in her case - so she had a Rent pot, a Food money pot, and so on. Yes, I can do that digitally now, but it took a long time to realise that it was an adjustment.
Travel
I have always preferred to travel by train, which I thought was just because I grew up going on holiday by train as my father was a railwayman so we had discounted travel. I thought I loved trains because he did, and it was just something we shared. A conversation this week with my spouse has led to some suprising-to-me revelations!
For me, it transpires that the reason why I find train travel so much less stressful is not just habituation from my childhood! Travelling abroad by train has much less stressors for me compared to flying.
Clothing
School uniforms were awesome, so finding a personal "work uniform" has been essential. Working from home it's a t-shirt and shorts/trousers with a soft bra, and when I was working onsite I had 2 pairs of identical jeans, which I rotated, half a dozen identical tops (3/4 sleeve black t-shirts), infinite identical black socks - no need to even hunt to make a pair, and the same shoes every day. Having the same clothes was one less stressor in the morning for getting ready to go to work.