Wildcard parameter for fetch call

Hey guys so I am new to this stuff, but was wondering if there is a way to put a “wildcard” parameter in a multi parameter fetch call.

For instance I am currently using JAVASCRIPT and my fetch call looks like this

fetch([https://us.api.blizzard.com/data/wow/connected-realm/${choice}/mythic-leaderboard/${dungeonSelected}/period/${currentWeek}?namespace=dynamic-us&locale=en_US&access_token=USI6QWoLHtWGKObkYySqlkHMi0HjwHxglF](https://us.api.blizzard.com/data/wow/connected-realm/$%7Bchoice%7D/mythic-leaderboard/$%7BdungeonSelected%7D/period/$%7BcurrentWeek%7D?namespace=dynamic-us&locale=en_US&access_token=USI6QWoLHtWGKObkYySqlkHMi0HjwHxglF))

Basically what I want to do is select all the data from the dungeon selected during the current week to return all of the dungeon runs from that dungeon. Something like this
where wildcard represents all realms not just one specific

fetch([https://us.api.blizzard.com/data/wow/connected-realm/${*****WILDCARD****}/mythic-leaderboard/${dungeonSelected}/period/${currentWeek}?namespace=dynamic-us&locale=en_US&access_token=USI6QWoLHtWGKObkYySqlkHMi0HjwHxglF](https://us.api.blizzard.com/data/wow/connected-realm/$%7Bchoice%7D/mythic-leaderboard/$%7BdungeonSelected%7D/period/$%7BcurrentWeek%7D?namespace=dynamic-us&locale=en_US&access_token=USI6QWoLHtWGKObkYySqlkHMi0HjwHxglF))