Subscribe inside useEffect doens't work in react-native - reactjs

Question

I have the following code which I use to subscribe to branch.io. Here, the first console.log() is printed. But it doesn't go beyond that. What am I doing wrong here?
import React, { useEffect, useState } from 'react';
import { View } from 'react-native';
import branch from 'react-native-branch';
import {
Button,
InviteSummary,
ListItem,
ScreenContainer,
Seperator,
Label,
} from 'components';
import { APP_HOME_SCREEN } from 'common/constants/screens';
import { copyContent, shareContent } from 'library/Utils';
import ChevronRight from 'res/icons/Chevron/Right';
import Copied from 'res/icons/System/checked.svg';
import Copy from 'res/icons/System/Copy';
const SCREEN_TITLE = 'Invite and earn';
let _unsubscribeFromBranch = null;
const Invite = () => {
const [referralLink, setReferralLink] = useState('');
const [linkCopied, handleCopy] = useState(false);
useEffect(() => {
console.log('before subscribe');
_unsubscribeFromBranch = branch.subscribe(({ error, params }) => {
console.log('in subscribe');
if (error) {
console.error('Error from Branch: ', error);
return;
}
console.log('Branch params: ', JSON.stringify(params));
if (!params['+clicked_branch_link']) return;
});
}, []);
const handleCopyLink = (text: string) => copyContent(text, () => handleCopy(true));
const handleShareLink = () => shareContent(referralLink);
return (
<>
<ScreenContainer
title={SCREEN_TITLE}
backScreen={APP_HOME_SCREEN}
backScreenIcon={<ChevronRight />}>
<View>
<InviteSummary
upperMainText='S$40.00'
lowerMainText='earned'
leftSubText='7 invites earned'
rightSubText='3 pending'
/>
<Label
type={Label.Types.BODY_SMALL}
label='when you invite a friend to no matter how many friends! To make things sweeter, each friend you invite gets S$5 too.'
/>
<Label
type={Label.Types.BODY_SMALL}
label='Referral credit will be awarded to you automatically once your friend activates their Visa debit card.'
/>
<Seperator />
<Label
type={Label.Types.BODY_SMALL}
label='SHARE Your unique invite link'
/>
<ListItem
title={referralLink}
rightIcon={linkCopied ? <Copied /> : <Copy />}
disabled={linkCopied}
onPress={() => handleCopyLink(referralLink)}
/>
</View>
</ScreenContainer>
<View>
<Button
type={Button.Types.PRIMARY}
text='SHARE LINK'
disabled={!linkCopied}
onPress={handleShareLink}
/>
</View>
</>
);
};
export default Invite;