How to search a group channel

// Detailed description of issue.
I am not able to search a group channel

// If problem, please fill out the below. If question, please delete.
[SDK Version]
// What version of the SDK are you using?
@sendbird/chat”: “^4.3.0”,

[Reproduction Steps]
// Please provide reproduction steps and, if possible, code snippets.
const sb = SendbirdService.chatClient;
const params = {
includeEmpty: true,
publicChannelFilter: “all”,
channelNameContainsFilter: Sendbird_${number}_${phone},
console.log("params ====== ", params);
const query = sb.groupChannel.createPublicGroupChannelListQuery(params);

        console.log("query ====== ", query);
        const channels = await;
        console.log("channels ======== ", channels);

in “query” variable I am not getting any channel

// How frequently is this issue occurring?

[Current impact]
// How is this currently impacting your implementation?
I am blocked due to this.