The market prices are highly unreliable because the actual daily percent gain(as per iNAV) is very low compared to volatility of the ETFs. The body of the candle is very big making it harder to know the actual movement.
Like if you could modify the “Past performance” section (Invest in Zerodha Nifty 8-13 Yr G-Sec ETF Online | LTGILTCASE) to provide iNAV data with a slider/picker for starting/ending date, even that would be better than nothing.