Hi SravanKra,
The name of the WiFi Hotspot has been changed by going to Settings > General > About > Name.
After looking at your screenshots it appears that you had two sims active on your phone. I have only one and for that Cellular network I have enabled Roaming On and in Mobile Data Options as well as the option Personal Hotspot is On.
The SIM is not an issue, because I have put the same SIM in an android phone and the Personal Hotspot is visible in fraction of a second to other devices when it switched on, no delay. In case of iPhone SE 3 that is not the case.
As I have already said earlier I have already tried to Reset Network connection and still the issue persists.
For Network coverage and stability
part when I turn on the Personal Hotspot I have 4 bars and 4G symbol. That seems to be fine
I have sufficient Data Balance. Right now I have a excess of 20 GB Data available in my account.
On your windows the WiFi Auto Joins is enabled. But this can only help when the iPhone SE broadcasts the WiFi Personal Hotspot SSID. Which it does after more than 5 minutes.
I do not have you have any stronger WiFi signal around your computer with the same SSID. I have observed though that the iPhone SE tends to use the WiFi Band num 6 when it transmits as WiFi Personal Hotspot.
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Have a great pleasant day