This is possible to a degree by using in-game commands made available by enabling cheats. However, this command won't necessarily change a biome's blocks, but an area's biome classification.

2) Using the locate command to find the structure and biome coordinates Use the locate command to get the coordinates of structures and biomes (Image via Sportskeeda Gaming || Mojang Studios) ...

We can use this structure to our advantage since it is found in the Deep Dark biome. Players can type in the command ‘/locate ancientcity’ and teleport to the coordinates provided.