useGetRecordRepresentation

// in src/posts/PostBreadcrumbs.tsx
import * as React from 'react';
import { Breadcrumbs, Typography } from '@mui/material';
import { Link, useGetRecordRepresentation, useRecordContext } from 'react-admin';

export const PostBreadcrumbs = () => {
    const record = useRecordContext();
    const getRecordRepresentation = useGetRecordRepresentation('posts');
    return (
        <div role="presentation">
            <Breadcrumbs aria-label="breadcrumb">
                <Link underline="hover" color="inherit" to="/">
                    Home
                </Link>
                <Link underline="hover" color="inherit" to="/posts">
                    Posts
                </Link>
                <Typography color="text.primary">
                    {getRecordRepresentation(record)}
                </Typography>
            </Breadcrumbs>
        </div>
    );
}

// in src/posts/PostEdit.tsx
import { EditBase, EditView, SimpleForm, TextInput } from 'react-admin';
import { PostBreadcrumbs } from './PostBreadcrumbs';

const PostEdit = () => (
    <EditBase>
        <PostBreadcrumbs />
        <EditView>
            <SimpleForm>
                <TextInput source="title" />
            </SimpleForm>
        </EditView>
    </EditBase>
)