Dialer doesn't show dual SIM calling Option

[S24ULTRA]

My S21 ULTRA 16GB RAM - 512 model. Issue Dialer doesn't show SIM 2 option. Although receive calls on SIM2

[Samsung_Support1]

Dear Samsung Member,

Greetings from Samsung Customer Support!

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Warm Regards,
Samsung Customer Support

[S24ULTRA]

compliant raised..thank u