If your skin is happy, healthy, not dry or oily and not prematurely ageing then that is a good thing and your microbiome is likely to be diverse and balanced.
Just be aware and respectful, if you do decide to use daily skin products choose ones that respect the skin microbiome so your skin stays that way.
If your skin is unhappy, inflammed or sensitive the root cause of this will be an imbalance or dysbiosis in the skin microbiome and an impairment in your skin barrier.
Choosing to use products that support and care for your skin microbiome and your skin barrier will be the best thing for you.
Modern living, over-use of harsh cleansers, pollution, skincare and cosmetics, pesticides, foods, UV, ageing, viruses and bacteria around us , medications, fabrics , our day to day exposure , how much we exercise, even stress can all contribute to variations in our skin microbiome. Ultimately causing variation in inflammation with on our skin and in our bodies. It is strong but fragile , a lot like our bodies.
Best to be kind to the skin microbiome.