I need help!! it keeps restarting so many times i don't know what to do!

Go to Settings > Battery > Battery Health, read the battery status message, and check the Maximum Capacity. If the message says the battery condition is not good, or the max capacity is below 80% it’s time to get a new battery: iPhone Battery Replacement - Official Apple Support

"I need help!! it keeps restarting so many times i don't know what to do!: Hi! my phone about a year old, the model is 15. it keeps restarting on itself. please help, I don't know how to fix it. soft resetting it doesn't work. it doesn't have a sim card and there is no external damage on it. genuinely its driving me up the wall since I need it for my day to day life. so far today its restarted around 20-30 times. its gone on recovery mode around 7 times and every time it says it hasn't found and issues. any advice??"

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iPhone Keeps Restarting:

You wouldn't happen to have been installing an update, were you? If so, it is presumedly stuck in a Boot Loop. Seeing "Recovery Mode" mentioned, is why I ask. Use my User Tip: How to Fix an iPhone in a Boot Loop - User Tip