Make a phone call in one SIM and simultaneously browse with the other

GSM Arena says your phone has SIMs in DSDS mode

To achieve what you want you need a phone with SIMs in DSDA mode

See What is the difference between dual sim active and dual sim stand-by?

So, sorry, you won't be able to achieve what you want with your phone.

For reference:

• From the standards for dual SIMs on GSM networks

Dual SIM Dual Standby (DSDS): both SIMs can be used for idle-mode network
connection, but when a radio connection is active the second connection is disabled.
As in the passive case, the SIMs in a DSDS device share a single transceiver.
Through time multiplexing two radio connections are maintained in idle mode. When in-call on one network it is no longer possible to maintain radio connection to the second network, hence that connection is unavailable for the duration of the call.
Registration to the second network is maintained

Dual SIM Dual Active (DSDA): both SIMs can be used in both idle and connected
modes. Each SIM has a dedicated transceiver, meaning that there are no
interdependencies on idle or connected mode operation at the modem level. Note
that in some DSDA devices the second transceiver may be 2G-only.

• 5G on DSDS phones is expected in Android 12 phones