I had a flight of stone steps up to my first floor flat, which we dug out when we were extending the ground floor of the property.
They built me a wooden ramp with handrails and a “platform” deck, also with handrails, as a temporary measure, but I love it so much I am keeping it and have applied stock fencing along the sides of the ramp and around the deck for safety. (Some would prefer wooden slats, I prefer stock fence

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It absolutely does get slippy when wet, as does all decking. So it needs cleaning every year (as does all decking), plus I use road salt in icy conditions and am planning to wrap the ramp part with chicken wire or stick roofing felt onto it or something to provide better grip when wet. (Mind it will be two years this November, and I am still living with it for now - as you do.

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All of which said, phb’s suggestion sounds good too
