Virtual numbers usually have some distinct characteristics, such as they may come from specific virtual number service providers whose number segments may have been identified and tagged by Telegram. You can try using some multi-account detectors/anti-detect browsers to help you create more private accounts that https://www.adspower.com/blog/how-to-be-anonymous-on-telegram.Telegram banning Virtual Numbers Accounts, how are they able to detect am using a virtual Number while registering on PC.
This is a decent solution, OPBuy ready-made accounts, with tdata they work longer
What is meant by sessions?Create the Tdata of the account. And use it via tdata. This makes it look like you are always using the same session. More secure