ESIM Hotspot use

Hi i4user,

Thanks for contacting Apple Support Communities!

We understand that you'd like to choose the line to use with your Personal Hotspot.

When you set up your iPhone to use 2 SIMs, the Personal Hotspot uses the line that you use for cellular data. You can learn more here: Share your internet connection from iPhone

Set up Personal Hotspot on iPhoneGo to Settings  > Cellular, tap Set Up Personal Hotspot, then follow the onscreen instructions.Note: If you don’t see Set Up Personal Hotspot as an option, and Cellular Data is turned on in Settings > Cellular, contact your carrier about adding Personal Hotspot to your plan.You can change the following settings:• Change the Wi-Fi password for your Personal Hotspot: Go to Settings > Personal Hotspot > Wi-Fi Password.• Turn off Personal Hotspot and disconnect devices: Go to Settings > Personal Hotspot, then turn off Allow Others to Join.If you set up your iPhone to use two SIMs, Personal Hotspot uses the line you select for cellular data. (See Manage your cellular plans for Dual SIM.)We hope this helps.

Cheers!