The best option is probably using a geo: URL. This should open in all devices in their favourite mapping application. Example. If you want to link to a specific store or similar beyond just a location you can add a "query" which some apps will use to highlight that. Example.

Another decent option is Plus Codes. These are a bit shorter and easier to manage but lack a URL format as far as I can tell. MJ75+P3 Toronto, Ontario.

You can also just link to an alternative service such as Open Street Maps. This avoids Google but still imposes a particular service on others.

You can just share links to maps, OpenStreetMaps has a bunch of different mobile apps, for example, Organic Maps is a good one. Links to OSM look like this: https://osm.org/go/zrfyVQn8--?node=164979149

https://framacarte.org

english ☞ https://framacarte.org/abc/en/

The economy of your attention The Framacarte is free, without ads or click traps. Our goal is to host a tool that serves you and does not use you. Contrary to the adage, here, you are not the product.

Controlling your data Framasoft collects as little data as possible. You have complete autonomy over it. We have no interest in tracking your behaviour, nor in exploiting it.

Respecting your freedoms Framacarte is based a Free-libre software¹. Its code is transparent, publicly auditable and there are no hidden features. It is built by the community, and everyone is free to fork it and lead the project in new directions.

https://umap.openstreetmap.de/en/

I believe NextCloud has this ability

I'm not sure how good they are for privacy, but I've used Felt before for a couple custom maps

The what3words app is awesome and lets you share any 10-foot square on the planet and save them into lists.

You could share a location