Impressive idea and I followed the same but it does not work with latest Spring boot, so I have changed a bit.

<plugin>
    <groupId>org.liquibase</groupId>
    <artifactId>liquibase-maven-plugin</artifactId>
    <version>4.31.1</version>

    <executions>
        <execution>
            <id>table-from-liquibase</id>
            <phase>generate-sources</phase>
            <goals>
                <goal>update</goal>
            </goals>
            <configuration>
                <promptOnNonLocalDatabase>false</promptOnNonLocalDatabase>
                <defaultSchemaName>h2</defaultSchemaName>
                <changeLogFile>src/main/resources/db.changelog/changelog.yml</changeLogFile>
                <url>jdbc:h2:${project.build.directory}/h2/tl_tables;INIT=create schema IF NOT EXISTS MYSCHEMA;</url>
                <username>sa</username>  <!-- Directly specify the username -->
                <password>password</password>  <!--  Consider using a more secure method for password -->
            </configuration>
        </execution>
    </executions>
    <dependencies>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>2.3.232</version>
        </dependency>
    </dependencies>
</plugin>


<plugin>
<groupId>io.github.openfeign.querydsl</groupId>
<artifactId>querydsl-maven-plugin</artifactId>
<version>7.0</version>

<executions>
    <execution>
        <configuration>
            <jdbcDriver>org.h2.Driver</jdbcDriver>
            <jdbcUrl>jdbc:h2:${project.build.directory}/h2/tl_tables;</jdbcUrl>
            <jdbcUser>sa</jdbcUser>
            <jdbcPassword>password</jdbcPassword>
            <packageName>com.ilan.query.sql</packageName>
            <targetFolder>${project.basedir}/target/generated-sources/java</targetFolder>
            <namePrefix>S</namePrefix>
            <schemaToPackage>true</schemaToPackage>
            <exportAll>false</exportAll>
            <exportTables>true</exportTables>
            <exportBeans>true</exportBeans>
            <beanAddFullConstructor>true</beanAddFullConstructor>
            <beanAddToString>true</beanAddToString>
            <beanPrefix>P</beanPrefix>
            <beanPrintSupertype>true</beanPrintSupertype>
        </configuration>
        <id>querydsl-sql-from-liquibase</id>
        <phase>generate-sources</phase>
        <goals>
            <goal>export</goal>
        </goals>
    </execution>
</executions>

<dependencies>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <version>2.3.232</version>
    </dependency>
</dependencies>
</plugin>