1) SBI RuPay Platinum Physical DC - only apply through branch. use Card Code: IRP (Indianoil RuPay Platinum DC) or Card Code: RPJ (RuPay JCB Platinum DC)
2) yes, use - SBI Billdesk website, freecharge app, phonepe app, SBI Yono website or Canara Setu website etc
3) No. SBI Virtual RuPay Global DC is Classic variant (Virtual is lifetime free). Your both card will coexist (Virtual + Physical).