Data is not visible on remote Oracle 18 XE connection

Question

I have created Oracle Database on windows machine , with test table.

CREATE TABLE TESTUSER ( NAME VARCHAR2(20) , LASTNAME VARCHAR2(20) );

and inserted data into this table

insert into testuser(name, lastname) VALUES('Jon','Doe');

Then remote connected to this database from another machine, connected and authenticated successfully, I can see table and columns, but when I query the table, it is empty.

Have anyone faced similar issue? will much appreciate the hint or correct direction.