Tata Tiago XT & XE model uses single H19( some H4 model fit in too) bulb for both low and high beam led with max output of 55W you can use any reliable LED brand of bulb with below 55w power for single bulb.

MACBOT M80-H4/H19 (H/L) High Lumen Car LED Head Light Bulb with 2 Year Replacement warranty of 2, 80/80W 12V
MACBOT M80-H4/H19 (H/L) High Lumen Car LED Head Light Bulb with 2 Year Replacement warranty of 2, 80/80W 12V
M80-H4/H19 (H/L) High Lumen Car LED Head Light Bulb suitable for highway driving; Set of 2 bulbs, providing a complete replacement for both headlights
₹ 5,580 ₹ 3,149
Osram H4 46204CW LED Retrofit 12V (Pack of 2)
Osram H4 46204CW LED Retrofit 12V (Pack of 2)
Color temperature of up to 6000K with stylish cool white, provides better visibility.; +80% lm increased compare to minimum ECE R37 requirements
₹ 6,270 ₹ 3,700
MACBOT M26-H4 (H/L) 2 Year Warranty (Make in India) Car LED HeadLight Bulb (Set of 2, 50/50W 12V)
MACBOT M26-H4 (H/L) 2 Year Warranty (Make in India) Car LED HeadLight Bulb (Set of 2, 50/50W 12V)
Actual 10000 Lumen; 5th Generation LED Chip; 2 Year Replacement Guarantee; 100 Watt; Make in India
₹ 3,800 ₹ 2,399

Tata Tiago XZ & XZ+ have two separate headlights where H11 bulb is used as a high beam headlight which is a reflector type light and while H7 bulb is used as a low beam bulb which is a projector type headlight.

Tiago XZ+ models high beam modelsTiago XZ+ models low beam models