What's your question? Ask

Typically, you won't transplant the bonsai into a larger pot, unless you want the tree to get larger. If you do choose to, it will only be a few millimeters larger at most. Sizing up too large too fast will result in strange large growth that won't fit the tree.

Repotting will also require trimming larger roots, leaving smaller roots to collect nutrients.

Many times, it will be best just to pull it out of the container, trim the large roots, spread out the smaller roots and repot with a suitable medium of soil and mosses, or even small pebbles to promote drainage.

This collection of articles will guide you on proper bonsai methods: https://www.gardeningknowhow.com/houseplants/bonsai