did you use a random or pre-selected seed?
did you allow friends or play solo?
will you reset chunks to make room for new biomes/terrain features with updates?
what mods did you use?
what difficulty did you select?
what gamerules did you change?
how long has it been going?
FYI, if you ever find yourself able to host your own server, it is possible to download your world from the realm and host it yourself without the monthly fees. It’s nice to have the peace of mind that the data is in your own hands.
This is great advice and recommended!
There is one caveat, that might bite an inexperienced person moving a world from a realm to dedicated hosting.
Marketplace add-ons are encrypted and cannot be directly transferred over. Many add-ons are available in both marketplace and other environments (Curse forge for example), but some of the most popular or obscure ones might not be (e.g. BOP: One of the best biomes add-ons, arguably the best on Bedrock, but only the Java version is available on Curse, its Bedrock version is marketplace only).
So depending on how the realm is set up and which add-ons it has running, it’s some extra work to either locate suitable replacements, start a private port/fork, or make replacements from scratch.